The ETA 7001 is a timeless mechanical hand-wound movement renowned for its slim profile and reliability in vintage-inspired watches.

​Overview

Introduced in 1971 by ETA/Peseux, the 7001 measures 10½ lignes (23.3mm diameter) and just 2.5mm thick, making it ideal for slim cases. This lever escapement caliber beats at 21,600 vph (3Hz) with 17 jewels and offers a 42-45 hour power reserve. It features central hour and minute hands, a small seconds at 6 o’clock, and Incabloc shock protection.
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Key Specifications

Dimensions: 23.3mm diameter, 2.5mm height (H2 type)

Jewels: 17, reducing friction in critical pivots

Frequency: 21,600 bph for smooth seconds sweep

Power Reserve: Approximately 42-45 hours when fully wound

Accuracy: Middle rate of +/-7 seconds/day; index or Etachron regulator

Hands: 1.30/0.80/0.17mm (hour/minute/small seconds)

Finish: Brass plates/bridges, nickel plating, beveled edges
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Historical Significance

Produced until recent years, the 7001 powered watches from Tissot, Longines, Omega, Nomos (1992-2005), Baume & Mercier, and modern brands like Baltic and Furlan Marri. It’s a direct replacement for Peseux 7001 and base for variants like Omega 651 or Ball automatics. Brands like Ming have heavily modified it for custom aesthetics.

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The ETA 9154, also known as the Ebauches SA or ESA 9154, represents an early bridge between mechanical and electronic watchmaking. Introduced around 1970, this vintage “Dynotron” movement marked a transitional phase in horology with its electronically controlled balance motor. Produced into the mid-1970s, it powered various watches during the quartz revolution’s dawn.
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Key Features

Electronic Regulation: Uses a transistor-based circuit to control the balance wheel, enabling a smooth sweep seconds hand unlike abrupt quartz stepping.

Calendar Functions: Includes quickset date, with some variants offering day-date complications via dedicated wheels and jumpers.

Hack Mechanism: Features mechanical and electrical stopping for precise time-setting, plus a sweep second pinion.

Battery-Powered: Relies on a standard cell (e.g., reference 343) with a fixing clamp, driving the motor electronically.

Technical Specs

Size and Build: Compact design with auxiliary plates, balance bridge, and interchangeable parts like those in related ETA/ESA 9157/9158 calibers.
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Components: Key elements include cannon pinion (SS, ref 245/1193), minute wheel (260/1109), and regulator (2-piece, 301/1399).

​Maintenance Notes: Prone to circuit issues like resistance in ESC contacts; repair involves cleaning solder residue.
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Historical Context

Ebauches SA, later absorbed into ETA, produced the 9154 amid 1970s innovation. Collectors value its quirky hybrid nature—mechanical gears with electronic pulses—for vintage restorations. Spare parts remain available for wheels, screws, and modules, supporting ongoing repairs.

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The ETA 9157 is an electronic tuning fork watch movement developed by ETA (under Ebauches SA, or ESA) in the late 1960s, marking a transitional technology between mechanical and quartz eras. Introduced around 1968 and produced into the 1970s, it powered affordable electronic watches with reliable timekeeping via an electronically controlled balance.
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Key Features

Tuning Fork Mechanism: Operates at 28,800 A/h (vibrations per hour) with a sweep seconds hand for smooth motion, using a balance motor rather than a traditional escapement.

Dimensions and Jewels: Measures 13 lignes (29mm diameter) in third-generation versions, featuring seven jewels for reduced friction.

Functions: Includes day/date display with quickset date (via 18-24 hour adjustment) and mechanical hacking seconds for precise synchronization.

Power Source: Battery-powered with electronic components like resistors, transistors, and a modern battery placement in later models.
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Historical Context

Part of the ESA Dynotron family (evolving from Cal. 9150 in 1967), the 9157 represented a redesign by 1975, relocating the balance 90 degrees and minimizing electronics for efficiency. It succeeded electric movements like Landeron 4750 but preceded dominant quartz calibers. Production ended by the late 1970s amid quartz dominance.

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The ETA 9158, originally an ESA Dynotron movement later produced by ETA, represents a transitional electronic caliber from the 1970s. Introduced around 1975, it features an electronically controlled balance motor with a sweep second hand for smooth operation. This third-generation Dynotron measures 13 lignes (29mm diameter) and offers reliable accuracy at 28,800 A/h beat rate.
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Key Specifications

Type: Electronic tuning fork/balance wheel hybrid, battery-powered quartz alternative.

Size: 29mm diameter, 6.2mm height, 7 jewels.

Functions: Hours, minutes, sweep seconds, day-date at 3 o’clock (often gold or blue disks).

Features: Electrical hacking for precise setting, shock-resistant elements.

Historical Context

Developed by Ebauches SA (ESA), the Dynotron family began with Cal. 9150 in 1967, evolving through 9154 to the 9158 by 1975. ETA continued production post-ESA merger, using it in watches like Jaz Divers and Hamilton models. It bridged mechanical and full quartz eras with minimal jewels for cost efficiency.

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Technical Highlights

The movement employs a prominent balance wheel and compact electronics, including resistors and transistors. Troubleshooting involves checking current consumption and train friction, as noted in 1970s service bulletins. Spare parts remain available for vintage repairs, including wheels and pinions.

Modern Relevance

Today, ETA 9158 appeals to horology enthusiasts restoring 1970s divers or dress watches. Its hi-beat electronic design offers accuracy without stepping motors, preserving sweep motion. Collectors value it for rarity in brands like Jaz.

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The ETA 9162 represents an innovative bridge between mechanical and electronic horology from the late 1960s. Introduced in 1969 by ETA (now part of Swatch Group), this movement features an electronically controlled balance motor, marking an early hybrid design in watchmaking. It powered select timepieces during a transitional era when quartz technology loomed large.
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Key Specifications

Introduction Year: 1969, coinciding with the quartz revolution’s onset.

Core Technology: Electronically regulated balance wheel with motor control for precise timekeeping.

Functions: Hours, minutes, sweep seconds, and hacking seconds (stops hand for precise setting).
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Size and Design: Compact for dress watches, with a focus on reliability in an era of mechanical dominance.

Historical Significance

The ETA 9162 emerged as watchmakers grappled with emerging electronic rivals. Produced by ETA, a powerhouse in Swiss movements, it utilized a sweep second hand for smooth motion akin to mechanical calibers. Though short-lived due to full quartz adoption, it exemplifies transitional engineering, appearing in various 1970s models.
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Technical Highlights

Balance Motor: Electronic control enhanced accuracy over pure mechanical oscillators.

Hack Feature: Allows second hand to halt during time-setting, a user-friendly innovation.

Usage Period: Primarily 1969 onward, before quartz fully supplanted hybrids.

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The ETA 9164 is a vintage electronic tuning fork watch movement produced in the early 1970s. Known for its innovative electronically controlled system, it offered reliable timekeeping during the quartz transition era.
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Key Features

Sweep second hand with smooth motion from the tuning fork mechanism.

Day and date complications, quickset via crown pulls.

Hack mechanism stops the balance for precise setting.

Technical Specs

Produced from 1972 to 1974 by ETA (and related to ESA 9164 base).

Battery-powered with accessible regulator in the compartment.

Shock protection and reliable restart on crown push.

Historical Context

Used in various Swiss watches, including Omega’s caliber 1260 variant. It bridged mechanical traditions and electronic precision amid the 1970s quartz crisis. Parts like intermediate wheels (203), third wheels (210), and cannon pinions (240) remain available for repairs.

​Service Notes

Stem release via sliding mechanism; common spares include sweep second wheel (227) and hour wheel (250). Ideal for vintage enthusiasts restoring 1970s pieces.

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The ETA 9180, often listed under ETA/ESA nomenclature, represents an early quartz innovation from the 1970s quartz crisis era. Developed by ETA (part of the Swatch Group lineage) and closely tied to Eterna’s ESA branding, this movement bridged mechanical traditions with electronic precision in Swiss watchmaking.
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Key Specifications

Type: Quartz-controlled stepper motor with sweep seconds hand.

Size: 29.00 mm diameter; approximately 5.55 mm thick (comparable to siblings like ETA 9164).
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Jewels: 7 jewels, primarily on visible movement side for seconds and third wheels.

Battery: Cell 343 (SR1130 equivalent).

Functions: Hours, minutes, sweep seconds, date with quickset (bidirectional).

Innovative Features

This caliber stood out with dual hacking: electrical via a lever at 8:30 and mechanical via a rotor-blocking lever. Its oversized, heavy rotor featured eight tiny permanent magnets and shock-protected bearings, driving a complex four-coil system—far more elaborate than modern single-coil Lavet motors. Dial-side innovations included a plastic date ring (prone to brittleness after decades) and yoke keyless works for setting.

​Historical Context

Introduced around 1973, the 9180 powered vintage pieces like Eterna Quartz Electronic watches, marking ESA’s final complex quartz design before simpler successors like the 9360. It highlighted rapid evolution, rendering mechanicals nearly obsolete overnight, yet offered reliability in 29mm cases from brands like Longines and Certina analogs. Parts remain available for restoration, including wheels (e.g., third wheel, cannon pinion).

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The ETA 9181 stands as a pioneering quartz movement from ETA, marking a key milestone in Swiss horology’s shift to electronic timekeeping. Introduced around 1973-1975 as one of the first mass-produced three-hand quartz calibers by Ebauches SA (later ETA), it powered analog displays with remarkable accuracy for its era.
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Key Specifications

Size and Build: 29 mm diameter (ligne 11.5), 5.75 mm thick, with high machine fabrication for cost efficiency.

Functions: Hours, minutes, seconds, often with day-date complications in variants like the 9181.

Power: Battery-driven (SR621SW or 364 cell), quartz-controlled stepper motor with 32,768 Hz crystal for precision.

Innovations: Features a unique four-coil stator for near-silent stepping, integrated electronics on a plastic plate, and hacking via crown contact closure.

Technical Highlights

This movement integrated a custom IC (E7047), variable capacitor, and attached stepper motor, emphasizing modularity over repairability—electronics were replaced as units. Produced mainly in the late 1970s to 1980s, it exemplified the Quartz Crisis transition, offering reliability in mid-range watches. Spare parts like cannon pinions, wheels, and coils remain available via specialists, though aging electronics pose service challenges.

​Historical Context

Developed amid quartz innovation, the 9181 predated widespread adoption but influenced ETA’s lineup, including sweep-second siblings like the 9180/9182. Collectors value it for vintage appeal in brands using early ETA quartz. Accuracy rivals modern standards, often within seconds per month.

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The ETA 9360 is a quartz watch movement from the Swiss manufacturer ETA SA, known for its reliable kinetic technology that combines automatic winding with quartz accuracy.
Overview

Introduced around the late 1990s to early 2000s, the ETA 9360 features a diameter of 25.60mm (11.5 lignes) and a height of 5.40mm, making it compact for mid-sized watches. It uses a quartz-controlled stepper motor for a smooth sweeping seconds hand, powered by a rotor that generates energy through wrist movement or manual crown winding. With 7 jewels and a frequency of 32,768 Hz, it ensures high precision without batteries.
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Key Features

Sweep Seconds Hand: Provides fluid motion unlike standard quartz ticks.

Date Function: Quickset capability for easy adjustment.

Automatic Charging: Self-winding rotor with micro-generator and capacitor for energy storage.

Analog Display: Traditional look with modern quartz reliability.

Technical Specs
Specification Detail
Size 25.60mm diameter, 5.40mm thick
Jewels 7
Frequency 32,768 Hz
Family Variants 9361 (date), 9362 (day-date)
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Power Source Kinetic (auto-wind rotor)
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Usage and Legacy

Commonly found in brands like Longines and Certina during its production era, the ETA 9360 bridged mechanical aesthetics with quartz efficiency. Spare parts remain available for repairs, including cannon pinions, crowns, and capacitors, supporting vintage restorations. Its durability suits daily wear, though servicing every 5-7 years is recommended for optimal performance.

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The ETA 9361 is a reliable quartz watch movement from the Swiss manufacturer ETA (now part of Swatch Group), known for its precision in mid-1980s timepieces. This stepper-motor design offers sweep seconds and a quick-set date, making it popular in vintage dress and sports watches. Produced primarily in the 1980s, it balances affordability with high accuracy, using a standard 32,768 Hz frequency.
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Key Specifications

Size: 11½ lignes (25.60 mm diameter), 5.40-5.50 mm height

Jewels: 7, reducing friction in critical pivots

Functions: Hours, minutes, sweep seconds, date (quickset)

Battery: Typically SR343 or equivalent (1.55V silver oxide)

Frequency: 32,768 Hz quartz oscillator for ±15 sec/month accuracy

Stem: 0.90 x 1.50 mm, compatible with ETA 9360 family
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Design and Features

The ETA 9361 employs a quartz-controlled stepper motor for smooth seconds hand movement, distinguishing it from ticking quartz calibers. Part of the 9360 series (e.g., 9360 no-date, 9362 day-date), it fits 25.60 mm cases with hands sized 150/90/25. Its compact profile suits slim profiles, and 7 jewels ensure longevity. Service parts like cannon pinion (952.101) and minute wheel (9362) remain available via specialists.
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Applications and Legacy

Found in brands like Certina, Tissot, and private-label watches, the 9361 powered affordable quartz models during the mechanical-quartz transition. Today, collectors value it for easy repairs and vintage appeal. Accuracy holds up post-service, though battery changes require care to avoid shorts. Spare parts lists confirm interchangeability within family.

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