The ETA 2816 is a reliable manual-wind movement from ETA’s 2800 family, known for its compact design and high-beat performance in vintage and mid-range Swiss watches. Produced since the 1980s, it operates at 28,800 beats per hour (bph) for smooth seconds hand sweep, making it a precursor to popular automatics like the 2824.
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Key Specifications

Size: 11.5 lignes (25.6mm diameter, ~4.6mm thick), ideal for smaller cases.

Jewels: 17, reducing friction for longevity.

Functions: Time-only (hours, minutes, small seconds); no date variants in core 2816.

Power reserve: Approximately 40-45 hours when fully wound.

Frequency: 28,800 bph (4Hz), balancing accuracy and durability.

History and Development

ETA developed the 2816 as part of the 2500/2800 series in the 1960s-1980s, evolving from earlier high-beat calibers like the 2732. It shares DNA with the workhorse 2824 but prioritizes manual winding for purists. Phased out post-2021 amid Swatch Group restrictions, it’s now scarce, boosting demand for serviced originals or clones like Sellita equivalents.
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Applications and Reliability

Found in brands like Tissot, Longines, and Certina dress watches during its run, the 2816 excels in serviceability with interchangeable parts across the 2800 family. It offers solid accuracy (±12-20 seconds/day unregulated) and resists magnetism better than older ETA manuals. Enthusiasts praise its robustness for daily wear, though servicing every 5 years is advised.

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The ETA 2816.1 is a reliable manual-wind mechanical movement from ETA SA, a Swatch Group subsidiary renowned for Swiss precision. Produced for mid-range watches, it features a sweep second hand, quickset day-date complications, and robust construction suitable for vintage-inspired timepieces.
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Key Specifications

Diameter: 25.60mm (11.5 lignes)

Height: 3.80mm

Jewels: 17

Frequency: 28,800 vph (4 Hz)

Power Reserve: Approximately 42 hours

Design Features

This slim movement supports bilingual day displays and quickset adjustments for user convenience. Its manual winding via a crown ensures direct control, appealing to purists who value traditional horology. The ETA 2816.1 belongs to the workhorse 2800 series, emphasizing durability over high complications.
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Applications and Legacy

Common in dress watches and reissues from brands like Tissot or Certina precursors, it powers elegant daily wearers. Spare parts remain available through specialists, aiding repairs for collectors. Though overshadowed by automatics like the 2824-2, its simplicity fosters easy servicing and longevity.

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The ETA 2817 is a manual-wind mechanical movement from ETA’s versatile 2800 family, developed in the late 1960s and produced from 1971 to 1977 in limited quantities. This compact caliber exemplifies ETA’s push for part reduction and efficiency, sharing nearly half its components with siblings like the 2816, while featuring sweep seconds for smooth timekeeping.
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Key Specifications

Type: Manual wind, no date complication (evolved from earlier 2750/2770 bases).

Production Era: 1971–1977, limited output as part of the 2800 series overhaul.

Part Count: Around 43 parts in base manual-wind versions, minimizing small springs via integrated designs.

Beat Rate: Likely 3 Hz (21,600 vph), aligning with family standards for reliability.

Historical Context

Introduced amid ETA’s modernization, the 2817 addressed inefficiencies in prior movements by using formed sheet metal over machined parts, slashing costs without sacrificing durability. Minor day-date tweaks distinguished it from cousins like the 2810 (later 2816), but its manual-wind focus suited slim dress watches. Production waned pre-quartz crisis, with few surviving variants.

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Technical Highlights

Efficiency: Low part count enabled slim profiles, ideal for vintage tool or dress watches.
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Reliability: Built on proven ETA evolution from 2370/2600 lines, emphasizing simplicity.

Modern Relevance: Scarce today; enthusiasts seek it for restorations, though successors like 2801 dominate.

Collectibility and Use

Vintage ETA 2817-powered pieces appeal to horology fans for their understated engineering. Service parts remain available via specialists, but scarcity drives value in original condition. Its legacy endures in the 2800 family’s influence on Swiss watchmaking.

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The ETA 2819 is a manual-wind mechanical watch movement produced by ETA from 1971 to 1977, known for its high-beat performance in vintage Swiss timepieces.

​Key Specifications

Size and Design: 11.5 ligne (25.60mm diameter), sweep seconds hand at the center, 17 jewels.

Beat Rate: 36,000 beats per hour (10 beats per second), offering smoother seconds hand motion compared to standard 28,800 bph movements.

Power Reserve: Approximately 46 hours when fully wound.

Features: Optional hacking seconds for precise time-setting; part of the ETA 2800 series derived from earlier 2750/2770 families.

Historical Context

Introduced in the early 1970s amid the quartz crisis, the ETA 2819 represented ETA’s push toward high-frequency mechanical calibers. It evolved from 1960s mainstream lines like the 2500/2600 series, sharing lineage with modern staples such as the ETA 2824. Production ceased in 1977, but its reliability made it popular in mid-tier watches from brands like Omega and Eterna suppliers.
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Technical Highlights

Winding: Hand-wound via split stem compatible with calibers 2800-2839; no automatic rotor.

Accuracy and Maintenance: Adjusted for reliability, with parts like the central seconds wheel still available from specialists; high beat demands precise regulation.

Modern Relevance: Sought by collectors and repairers for vintage restores; interchangeable stems aid servicing.

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The ETA 2824-2 is a renowned Swiss automatic mechanical watch movement from ETA SA (Swatch Group), celebrated for its reliability and widespread use in mid-range timepieces since the 1950s base design. Known as “the workhorse of the industry,” it powers brands like Tissot, Hamilton, and Certina, offering hours, minutes, seconds, and date functions with a power reserve of about 38-42 hours.

​Key Specifications

Dimensions: 25.6mm diameter (11.5 lignes), 4.6mm thick, 17-25 jewels depending on grade.

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

Features: Hacking seconds (stops for precise setting), bidirectional automatic rotor, Incabloc shock protection, and quick-set date.

History and Variants

Introduced in the 1970s as an evolution of the ETA 2821 manual-wind caliber, the 2824-2 added automatic winding via a ball-bearing rotor. Grades range from Standard (17 jewels) to Elabore, Top (Nivachron balance), and Chronometer (COSC-certified). Production continues despite Swatch’s 2020s “eta-nomics” restrictions favoring in-house calibers.
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he ETA 2824-2 is a legendary Swiss automatic watch movement renowned for its reliability and widespread use across brands. Introduced in the 1970s and refined since 1982, it powers countless timepieces with proven durability.
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History

Born from ETA’s push for efficient mass production amid the quartz crisis, the 2824 evolved from the manual-wind ETA 2801 by adding an automatic module. It set industry standards for over 50 years, facing supply controversies in the 2010s before successors like the Powermatic 80 emerged.
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Key Specifications

Size and Jewels: 11.5 lignes diameter, 25 jewels (up from 17 in base models for automatic winding).

Beat Rate: 28,800 vph (4 Hz) for smooth seconds sweep.

Power Reserve: Approximately 38 hours when fully wound.

Features: Bidirectional ball-bearing rotor, manual winding, hacking seconds, Novodiac/Etachoc shock protection.

Accuracy Grades

Standard: ±12 to +30 sec/day, 2-position adjustment.

Elaboré: ±7 to +20 sec/day, 3 positions.

​Top: ±4 to +15 sec/day, 5 positions.

Chronomètre: -4/+6 sec/day, COSC-certified.

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The ETA 2824-1 is a foundational Swiss automatic mechanical watch movement from ETA SA, renowned for reliability and precision since its development in the 1970s. Often compared to the more common 2824-2 variant, it shares core specs but represents earlier grades with fewer jewels. This workhorse powers countless mid-range watches, offering smooth operation and easy servicing.
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Key Specifications

Diameter: 25.6 mm (11.5 lignes)

Height: 4.6 mm

Jewels: 17–25, depending on grade (2824-1 typically lower, e.g., 17–21)

Frequency: 28,800 vph (4 Hz) for fluid seconds sweep

Power Reserve: 38–42 hours

Functions: Hours, minutes, central hacking seconds, date at 3 o’clock

History and Development

Introduced around 1972 and refined by 1982, the ETA 2824 series evolved from Eterna Caliber 1427 (1950s). ETA SA, founded in 1856, prioritized ébauches production post-1932 split from Eterna. The 2824-1 denotes base grades, while 2824-2 adds jewels for the automatic rotor.
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Grades and Accuracy

Available in Standard (±12–30 sec/day, 2-position adjustment), Elaboré (±7–20 sec/day, 3 positions), Top (±4–15 sec/day, 5 positions), and Chronometer (COSC-certified, -4/+6 sec/day). Higher grades use Glucydur balance, Incabloc shocks.

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The ETA 2824-2: A Horology Workhorse

The ETA 2824-2 stands as one of the most reliable automatic mechanical movements in Swiss watchmaking, produced since 1982 and derived from the Eterna Caliber 1427. Known for its robustness, versatility, and widespread use across brands like Tissot, Hamilton, and Longines, it powers countless mid-range timepieces with proven durability.

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Key Specifications

Size: 25.6mm diameter (11.5 lignes), 4.6mm thick.

​Jewels: 25, with bi-directional ball-bearing rotor.
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Frequency: 28,800 beats per hour (4Hz), 38-42 hour power reserve.

Functions: Hours, minutes, sweeping seconds, date at 3:00; hacking seconds, hand-windable.

Grades and Accuracy

The movement comes in four grades, differing in adjustment positions, components, and precision:

Standard: ±12 to +30 sec/day (2 positions).

Elaboré: ±7 to +20 sec/day (3 positions).

Top: ±4 to +15 sec/day (5 positions, upgraded balance/hairspring).

Chronometer: COSC-certified, -4/+6 sec/day.

Most units are Standard grade, averaging ±12 sec/day, yet often outperform specs when regulated.
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History and Legacy

Originating in 1972 as ETA 2824 (updated to -2 in 1982 with 25 jewels from 17), it evolved from Eterna designs post-Swatch Group integrations. Post-patent expiration, clones like Sellita SW200 emerged, but ETA’s original remains prized for serviceability—recommended every 5 years—and parts availability.

Pros and Usage

Reliable “workhorse” for daily wear, easy to service by watchmakers.

Found in brands like Certina, Oris, Tudor; customizable rotors.
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Its modular design (automatic module on ETA 2801 base) ensures longevity, making it ideal for enthusiasts and professionals seeking precision without complexity.

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The ETA 2826-2 is a reliable automatic mechanical movement from the ETA 2800 family, renowned in Swiss watchmaking for its precision and widespread use.

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Overview

Introduced in 2004, the ETA 2826-2 builds on the classic 2824-2 with a distinctive big date complication at 3:00, using overlapping discs for a larger display. It operates at 28,800 vibrations per hour (4 Hz) for smooth seconds hand motion and offers a 42-hour power reserve. With a height of 6.20 mm and 25 jewels, it fits versatile case designs while supporting bi-directional automatic winding via a central rotor.

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Key Specifications

Dimensions: 25.60 mm diameter, 6.20 mm thick

Jewels: 25

Frequency: 28,800 A/h
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Power Reserve: 42 hours

Functions: Hours, minutes, sweeping seconds, big date

Winding: Automatic with manual option

History and Availability

The original ETA 2826 appeared briefly from 1971-1977 in limited production, but the 2826-2 became a staple until phased out after 2021 due to Swatch Group restrictions. Post-2020, ETA limited sales to Swatch brands, prompting independents to adopt Sellita SW200 equivalents. It powered countless mid-range watches from brands like Tissot and Hamilton.
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Advantages for Enthusiasts

This movement excels in serviceability, with interchangeable parts across the 2800 series and proven accuracy. Vintage restorers value its robustness for repairs, though modern alternatives like Powermatic 80 offer longer reserves. Ideal for collectors seeking affordable mechanical reliability.

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The ETA 2826-2 is a reliable automatic mechanical watch movement from ETA, part of the Swatch Group’s 2800 family, prized for its precision and versatility in mid-range Swiss watches.
Key Specifications

Diameter: 25.6 mm, fitting standard 38-42 mm cases.

Height: 6.20 mm, allowing big date complication without excessive thickness.

Jewels: 25 synthetic rubies for reduced friction.

Frequency: 28,800 vibrations per hour (4 Hz) for smooth seconds sweep.

Power reserve: 38-42 hours with bi-directional rotor winding.

Accuracy: Typically -12/+12 seconds per day in chronometer grades.

History and Development

Introduced around 2004-2006, the ETA 2826-2 evolved from the base 2824-2 by adding a semi-instantaneous big date at 3 o’clock, enhancing readability for modern designs. It features hacking seconds for precise time-setting and Incabloc shock protection. Production continues despite Swatch Group export limits since 2020, pushing brands toward alternatives like Sellita SW330.
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Features and Reliability

This self-winding caliber offers central hours, minutes, seconds, and magnified big date, with a ball-bearing rotor for efficient winding. Known as a “workhorse,” it powers brands like Tissot, Hamilton, and Oris, balancing affordability with COSC certification potential. Service intervals reach 5-8 years due to robust construction.

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