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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The ETA 9362 is a compact quartz watch movement from ETA (now part of Swatch Group), known for its reliability in vintage and mid-range timepieces from the 1970s onward.
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Key Specifications

Size: 11.5 ligne (26 mm diameter, 25.6 mm mounting), 5.4 mm height.

Jewels: 7 synthetic rubies for reduced friction.

Frequency: 32,768 Hz, standard for quartz accuracy.

Battery: Typically SR343 (silver oxide cell).

Hands: Hour 1.50 mm, minute 0.90 mm, second 0.25 mm.

Functions and Features

This movement supports basic timekeeping with sweep seconds and often a quickset date. It uses three stepper motors for smooth operation, making it suitable for chronograph variants in some models. Produced around 1977 and into later decades, it powered brands like Luxor in stainless steel watches.
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Historical Context

Introduced during the quartz revolution, the ETA 9362 bridged mechanical traditions with electronic precision, fitting 25.60 mm cases. It’s interchangeable with similar calibers like ETA 9361 or 9360, aiding repairs. Vintage examples remain popular on platforms like Etsy for their analog charm and serviceability.

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The ETA A07.111 is a robust automatic mechanical movement from ETA’s Valgranges family, designed for larger watches. Produced from around 2004 to 2021, it offers reliable performance with a date complication, making it popular among brands seeking oversized calibers.
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Key Specifications

Diameter: 36.6 mm (16½ lignes), ideal for big-case watches over 42mm.

Height: 7.9 mm, balancing power reserve with wearability.

Jewels: 24, reducing friction in critical pivots.

Frequency: 28,800 vph (4 Hz), for smooth seconds hand sweep.

Power Reserve: Approximately 48 hours when fully wound.

Design and Features

This self-winding caliber uses a central rotor for bidirectional winding, ensuring efficient energy storage. It includes a small seconds subdial at 6 o’clock and a date window, typically at 3 o’clock, with standard hacking for precise time-setting. The Valgranges line emphasizes industrial production scalability, succeeding ETA’s Unitas movements like the 6497 while addressing demand for chronometer-grade reliability in modern contexts.
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Applications and Legacy

Found in various luxury and tool watches, the A07.111 powers models needing substantial presence without quartz alternatives. Variants like A07.161 add day-date, but the base model prioritizes simplicity. Phased out post-2021 amid Swatch Group restrictions, it remains serviceable with available spares for enthusiasts. Its ETA 7750-inspired architecture ensures longevity in repairs.

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The ETA 2850 is a reliable manual-wind mechanical movement from ETA, known for its precision in vintage and dress watches.
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Overview

Produced by ETA SA Manufacture Horlogère Suisse, the 2850 belongs to the workhorse family of Swiss ebauches, emphasizing slim design and smooth operation. It features a sweep seconds hand for fluid timekeeping and typically includes 17 jewels to reduce friction. This caliber powered numerous mid-range watches from the 1970s onward, valued by collectors for serviceability.
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Key Specifications

Diameter: 25.6 mm (11.5 lignes), fitting standard 38-42 mm cases

Height: Approximately 4.3 mm, enabling thin profiles

Frequency: 28,800 vibrations per hour (4 Hz) for accurate sweeping

Power Reserve: Around 50 hours when fully wound

Jewels: 17 standard, supporting longevity

Winding: Manual via crown; optional hacking for precise setting

Features and Reliability

The movement uses a Glucydur balance and Breguet hairspring for stability against shocks and positions. Its straightforward construction aids repairs, with parts widely available for vintage restorations. Variants may include date complications, though base models prioritize simplicity.

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The ETA 2851 is a reliable Swiss-made mechanical hand-wound watch movement from ETA SA Manufacture Horlogère Suisse, known for its precision in mid-range timepieces.
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Key Specifications

Diameter: 25.6mm (11.5 lignes), fitting standard 38-42mm cases.

Height: 4.3mm, slim for versatile designs.

Jewels: 12-17, reducing friction; variants like ETA 2851-1 use 12.

Beat Rate: 21,600 vph (3 Hz), balancing smoothness and longevity.

Power Reserve: Approximately 60 hours when fully wound.

Functions: Three hands (hours, minutes, seconds); no date in base model.

Design and Performance

Crafted with Geneva stripes and high-quality finishing, the ETA 2851 features a lift angle of 52 degrees for efficient energy transfer. Its hand-winding mechanism uses a crown to tension the mainspring, ideal for purists avoiding automatics. Accuracy typically holds at -10/+20 seconds per day, enhanced by hacking seconds in some grades.

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The ETA 2852 is a reliable manual-wind mechanical movement from ETA, introduced around 1970, known for its precision and use in vintage watches.
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Key Specifications

Size and Design: 11.5 lignes (25.60mm diameter), 4.15mm height, with sweep seconds and quickset date.

Jewels and Frequency: 17 jewels, beats at 28,800 A/h (4 Hz), offering about 50 hours power reserve.

Family Variants: Part of the 2850 series; 2850/2851 (no date), 2852/2853 (date), up to 2878/2879 (day-date automatic).
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Historical Context

Developed as a “Gabarit” template succeeding older ETA 2800 designs, the 2852 powered models like early Doxa SUB 300T divers before upgrades to ETA 2824-2. Its slim profile suited mid-sized dress and tool watches from brands seeking robust, serviceable calibers amid the quartz crisis.
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Features and Performance

Quickset date via pusher enhances usability, with optional hacking for precise time-setting. Incabloc shock protection ensures durability in daily wear. Though superseded by automatics like 2824, it remains prized for repairs due to available spares like barrels and wheels.

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The ETA 2853 is a reliable manual-wind mechanical movement from ETA SA, known for its precision in mid-range Swiss watches. Produced in the late 20th century, it belongs to ETA’s 2800/2900 series, emphasizing robustness and serviceability. This caliber powers time-only displays with a date complication, making it ideal for classic dress watches.
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Key Specifications

Type: Manual wind, sweep seconds, quickset date.

Dimensions: 11.5 lignes (25.60 mm diameter), 4.15 mm height.

Jewels: 17.

Beat rate: 21,600 vibrations per hour (3 Hz).

Power reserve: Approximately 60 hours.

Performance and Features

The ETA 2853 delivers consistent accuracy, often within chronometer standards when regulated properly. Its instant date change and quick correction enhance usability, while the Incabloc shock protection ensures durability. With a lift angle suited for efficient energy transfer, it offers a smooth sweep second hand visible through exhibition casebacks.
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Historical Context

Derived from ETA’s foundational designs in the 1960s-1970s, the 2853 exemplifies the transition to high-beat movements without automatic winding. It remains sought after for vintage restorations and custom builds due to abundant spare parts availability. Brands like Omega and Tissot historically used similar ETA calibers for their workhorses.

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The ETA 2859 is a reliable manual-wind mechanical movement from the Swiss manufacturer ETA, known for its precision in mid-20th-century watchmaking.

​Key Specifications

Size and Build: 11.5 lignes (25.60mm diameter), 4.15mm height, 17 jewels.

Functions: Sweep seconds, quickset date, bilingual day wheel (quickset, 2 languages).

Performance: 21,600 beats per hour (A/h), 60-hour power reserve.

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