The ETA 2893-1 is a renowned automatic mechanical watch movement from ETA SA, prized for its GMT functionality and reliability in mid-to-high-end timepieces.

​Key Specifications

Diameter: 25.6 mm (11½ lignes), fitting standard 40-42 mm cases.

Height: 4.1 mm, slim for versatile case designs.

Jewels: 21 (base) or 25 in some variants, reducing friction.

Frequency: 28,800 vph (4 Hz), balancing smoothness and longevity.

Power Reserve: 42 hours when fully wound.

Functions: Hours, minutes, sweeping seconds, date at 3 o’clock, 24-hour GMT hand.

Design and Features

This modular movement builds on the ETA 2892-A2 base, adding a 24-hour subdial for traveler-friendly GMT display. It supports hacking (seconds stop when crown pulled) and manual winding via a bidirectional rotor. Swiss-made with a lift angle of 51 degrees, it ensures accuracy within chronometer standards in regulated versions.
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Usage in Watches

Popular in brands like Omega, Tissot, and Longines, the 2893-1 powers models such as the Omega Seamaster Aqua Terra GMT. Variants like 2893-2 (date) and 2893-3 (no date) offer customization. Its serviceability and parts availability make it ideal for watchmakers.

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The ETA 2893-2 is a renowned Swiss automatic watch movement from ETA (part of the Swatch Group), celebrated for its GMT functionality and reliability in mid-to-high-end timepieces. Building on the proven ETA 2892-A2 base, it adds a 24-hour hand for dual-time tracking, making it ideal for travelers. This slim, high-beat caliber powers brands like Longines, Oris, and Steinhart.
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Key Specifications

Diameter: 25.6 mm (11.5 lignes)

Height: 4.1 mm, enabling thin case designs

Jewels: 21, reducing friction for longevity

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

Power Reserve: ~42 hours when fully wound

Core Functions

Central hours, minutes, and sweeping seconds

Date window with quickset

Independent 24-hour/GMT hand for second time zone

Hacking seconds (stops for precise setting) and manual winding option

​Performance and Grades

Available in Elabore, Top, and Chronometer grades, it offers accuracy from ±12 to COSC-certified -4/+6 seconds per day. Features Incabloc shock protection, ETACHRON regulator, and bi-directional rotor for efficient self-winding. Its 51-degree lift angle ensures consistent power delivery.

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The ETA 2893-3 is a Swiss-made automatic movement renowned for its slim profile and world time functionality, introduced in 1992 as part of ETA’s 2890 family. Derived from the ETA 2892-A2 base, it adds a modular “universal hour mechanism” without a date complication, distinguishing it from siblings like the 2893-1 and 2893-2.
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Key Specifications

Diameter: 25.50 mm (11.5 lignes, slightly narrower than family average).

Height: 4.10 mm, ideal for thin cases.

Jewels: 21, with Incabloc shock protection.

Frequency: 28,800 vph (4 Hz) at 51° lift angle; 42-50 hour power reserve.

Winding: Bi-directional automatic rotor, hand-windable, hacking seconds.

Functions and Features

The 2893-3 displays central hours, minutes, seconds, plus a central 24-hour world time disc at 3:00 with city ring, enabling quick timezone adjustments without stopping the seconds. The independent world time disc (part 2520/1) uses crown position 2 for setting, preserving accuracy during travel—unlike traveler-style GMTs. Available in Elaboré, Top (Glucydur balance), or Chronomètre grades for varying precision.

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The ETA 2894-2 is a Swiss-made automatic chronograph movement renowned for its modular design and reliability in luxury timepieces. Built on the proven ETA 2892 base with an added chronograph module, it powers watches from brands like Omega, Chopard, and Girard-Perregaux. This 37-jewel caliber offers precise timekeeping at 28,800 vibrations per hour (4 Hz).
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Key Specifications

Diameter: 12½ lignes (28 mm), suitable for mid-sized cases

Height: 6.1 mm total (H1 configuration), slim for versatile use

Power Reserve: 42-48 hours, with bi-directional automatic winding via ball-bearing rotor

Functions: Hours, minutes, small seconds at 3:00; date at 4:30; 60-second, 30-minute, and 12-hour chronograph counters

Features: Incabloc shock protection, ETACHRON regulator, hacking seconds, lever-escapement system

Design and Performance

The modular construction allows easy servicing by separating the chronograph plate from the base, reducing repair costs compared to integrated chronographs. Its balanced subdials (3-6-9 layout with date) provide clear readability, ideal for sports chronos like Omega Speedmaster variants. Accuracy typically holds at -5/+15 seconds per day when regulated, enhanced by the 2892’s superior shock resistance over predecessors like the 2824.

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The ETA 2806 is a reliable manual-wind mechanical movement from the Swiss manufacturer ETA SA, produced primarily in the 1970s. Known for its slim profile and precision, it powered various mid-range watches during its era. This article explores its key features, history, and appeal to collectors and repair specialists.
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Technical Specifications

Size and Build: 11.5 lignes (25.6mm diameter), 3.35mm height, ideal for thinner cases.

Jewels: 17 synthetic rubies reduce friction on pivots.

Frequency: 36,000 vibrations per hour (5 Hz) for smooth seconds hand sweep.

Power Reserve: Approximately 46 hours when fully wound.

Functions: Sweep seconds, date at 3 o’clock; lift angle of 53°.

Historical Context

Introduced around 1971 and phased out by 1977, the ETA 2806 belongs to ETA’s high-beat family, evolving from earlier 28xx series calibers. It emphasized manual winding without automatic complications, suiting dress watches. Production ceased amid the quartz crisis, making surviving examples sought after for vintage restorations.

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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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