The ETA 1316 is a reliable automatic watch movement produced by ETA SA, known for its precision and widespread use in mid-range Swiss timepieces around the year 2000. This caliber features a sweep second hand, quickset day-date complication, and an optional hacking mechanism for precise time setting.
Key Specifications

Type: Automatic with self-winding rotor.

Functions: Hours, minutes, sweep seconds, day, and date (quickset at 3 o’clock position).

Dimensions: Approximately 11.5 ligne (25.6mm diameter), slim profile suitable for dress watches.

Jewels: Typically 25-28 jewels for reduced friction.

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

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The ETA 1721.1 is a notable Swiss mechanical movement, produced from 1976 to 1983, and widely used in ladies’ watches due to its compact size and reliable performance. This movement is highly regarded for its indirect minute drive, which allows for a larger balance and mainspring barrel, improving accuracy and power reserve.
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Key Features

17 jewels for smooth operation and durability.

Indirectly driven minute hand for better balance and increased runtime.

Nickel annular balance wheel for stable timekeeping.

Pallet lever escapement for consistent performance.

Incabloc shock protection for added resilience.

Clockwise balance direction and moveable stud for precise adjustment.
Yoke winding system for efficient manual winding.

Technical Details

Diameter: 7 3/4” (approximately 17.2mm).

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

Production period: 1976–1983.

Setting lever spring: 2 holes.
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Bulletin Points

17-jewel movement for reliability.

Indirect minute drive for improved power reserve.

Nickel annular balance for stable timekeeping.

Incabloc shock protection.

Manufactured between 1976 and 1983.
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The ETA 1721.1 stands out for its innovative design and enduring reliability, making it a favorite among vintage watch collectors and restorers. Its technical features and historical significance continue to make it a respected movement in horology.

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The ETA 2000.1 is a compact and elegant automatic movement produced by ETA SA, widely recognized for its reliability and precision in Swiss watchmaking. Introduced in the early 1990s, this movement is particularly favored for its slim profile, making it a popular choice for women’s watches and other small timepieces.
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Key Features

The ETA 2000.1 measures just 3.6 mm in height, making it one of the thinnest automatic movements available.

It features central hours, minutes, and sweeping seconds, along with a date function at 3 o’clock that can be quickly set.

The movement has hacking seconds, allowing for precise time setting.

It is powered by the motion of the wearer’s wrist and offers a 40-hour power reserve.

Technical Specifications

Diameter: 19.4 mm

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

Jewels: 20

Country of manufacture: Switzerland

Applications and Reputation

The ETA 2000.1 is frequently used in luxury and mid-range brands, including Movado (e.g., Elliptica models) and other manufacturers seeking a reliable, thin automatic movement.

Its slim design and accurate timekeeping make it suitable for dress watches and jewelry-style timepieces.

The movement is Swiss-made, reflecting ETA’s long-standing reputation for quality and durability.
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The ETA 2000.1 continues to be a respected movement in the watch industry, especially for those who value elegance and reliability in a compact automatic caliber.

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The ETA 2004.1 is a reliable automatic mechanical movement widely used in Swiss and international watch brands. Known for its robustness and accuracy, the ETA 2004.1 has become a staple in many mid-range and entry-level mechanical watches, appreciated for its balance of performance and affordability.
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Key Features of ETA 2004.1

Movement Type: Automatic (self-winding)

Diameter: 23.30 mm (10 1/2’’’)
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Thickness: 5.50 mm

Jewels: 20

Power Reserve: Approximately 40 hours

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

Bulletin Points

The ETA 2004.1 is designed for analog display watches, making it suitable for classic and modern designs alike.

It is part of ETA’s long-standing tradition of producing high-quality, mass-produced movements that are easy to service and repair.

The movement is often used by brands looking for a dependable base caliber that can be customized with different complications and finishes.

Due to its compact size and efficient automatic winding system, the ETA 2004.1 is favored in slim dress watches and smaller cases.

It is compatible with a wide range of spare parts, which simplifies maintenance and repairs for watchmakers.
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Conclusion

The ETA 2004.1 remains a popular choice for watchmakers and brands seeking a dependable, serviceable, and versatile automatic movement. Its specifications and widespread availability ensure it continues to be a cornerstone in the world of mechanical watches.

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The ETA 2094 is a compact automatic chronograph movement designed for smaller watches, particularly ladies’ timepieces, offering a blend of precision and practicality in a reduced size.
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Key Features

The ETA 2094 is part of ETA’s Mecaline Specialty line, introduced in 2003, and is based on the ETA 2004-1 platform.

It features an automatic winding system, 33 jewels, and operates at a frequency of 28,800 vibrations per hour (4 Hz), ensuring reliable timekeeping.

The movement is compact, with a diameter of 23.3 mm and a height of 5.5 mm, making it suitable for watches with limited case space.

It includes a date display function, commonly referred to as “DATE4” in technical specifications.

The power reserve is approximately 37 hours, which is typical for movements of this size and complexity.

Usage and Status

The ETA 2094 was primarily used in smaller chronograph watches, especially those designed for women, due to its size and aesthetic appeal.

As of recent years, the caliber has been phased out by ETA, meaning it is no longer in active production but remains a sought-after movement among collectors and for vintage watch restoration.

Notable Points

The movement’s compact design makes it a preferred choice for brands seeking to fit an automatic chronograph in a smaller case without sacrificing functionality.

It is visible through transparent case backs in some models, showcasing its craftsmanship and custom rotor designs.

The ETA 2094 is a testament to ETA’s engineering expertise in creating specialized movements for niche watch designs.

This movement continues to be valued in the horological community for its blend of technical innovation and elegant design, especially in vintage and specialty timepieces.

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The ETA 2360 is a classic manual-wind watch movement that played an important role in Swiss horology during the mid-20th century. It was produced by ETA from 1958 to 1967 and is known for its compact size and reliability in vintage timepieces.
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Key Features

The ETA 2360 is a hand-wound movement with a size of 7 3/4 ligne, making it suitable for smaller watches.

It features a Swiss lever escapement and a direct sweeping seconds hand, which is typical for movements of this era.

In 1964, ETA made a significant change by switching from a fixed to a mobile stud carrier, improving the movement’s performance and serviceability.

Technical Details

The movement is a base caliber, with the ETA 2363 being a closely related variant.
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It is not equipped with a calendar or date function, focusing instead on simple timekeeping.

The click spring is a critical spare part for maintenance and repair of the ETA 2360, ensuring the winding mechanism operates smoothly.

Historical Context

The ETA 2360 was used by several Swiss watch brands during its production run, often in elegant, thin dress watches.

Its compact design made it a popular choice for watches with limited case space, contributing to its reputation for reliability and precision.

Bulletin Points

Manual-wind movement produced from 1958 to 1967.

7 3/4 ligne size, suitable for small watches.

Swiss lever escapement, direct sweeping seconds.

Mobile stud carrier introduced in 1964.

No calendar complication; simple time-only display.

Click spring is a vital spare part for servicing.

The ETA 2360 remains a respected movement among vintage watch collectors and restorers for its historical significance and mechanical simplicity.

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The ETA 2370 is a classic manual-wind movement introduced by ETA in the early 1950s, marking a pivotal point in Swiss watchmaking history. It served as the direct forerunner to the famous ETA 2390 series and remains a favorite among vintage watch enthusiasts for its robust construction and elegant design.
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Key Specifications

Size: 11 1/2”’ (approximately 25.5 mm diameter)

Height: 4.15 mm

Frequency: 18,000 vibrations per hour (A/h)

Lift Angle: 52.23°

Jewels: 17

Power Reserve: 49 hours

Escapement: Swiss pallet lever

Shock Protection: Incabloc

Notable Features

Indirectly driven hands via the third wheel pinion, allowing for a larger balance and mainspring barrel

Yoke winding system for smooth manual winding

Glucydur screw balance for high precision

Long regulator arm for fine frequency adjustment

Hack feature (stops seconds hand when setting time)

Historical Context

The ETA 2370 was among the first movements to feature modern construction techniques, such as indirectly driven hands and a solid 11 1/2 ligne layout. Its design set the stage for later ETA calibers and contributed to the company’s reputation for reliability and precision.

Usage and Legacy

Predominantly used in the 1950s and 1960s, the ETA 2370 powered a variety of classic watches. Its solid build, Incabloc shock protection, and beautiful Glucydur balance make it a sought-after movement for restoration and collection.

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The ETA 2390 is a classic mechanical manual-wind movement known for its reliability and widespread use in vintage Swiss watches. Introduced in the mid-20th century, it remains a favorite among collectors and watchmakers for its robust design and straightforward mechanics.
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Key Features

Movement Type: Mechanical, manual-wind

Diameter: 10.5”’ (23.2–23.7 mm)

Height: 3.6 mm

Jewels: 17

Frequency: 18,000 vibrations per hour (2.5 Hz)

Power Reserve: Approximately 47 hours

Lift Angle: 52°

Regulation: Features a screw balance and Swiss lever escapement; later versions include an annular (screw-less) balance

Seconds: Direct central sweeping seconds

Hairspring: Early models have a fixed stud-holder, while later ones feature a mobile stud-holder

Notable Details

The ETA 2390 is part of a family of movements, with the ETA 2391 being a slightly larger version (11.5”’).

The movement is shock protected, ensuring durability.

It is commonly found in watches from the 1950s and 1960s, and its simple architecture makes it a popular choice for restoration and repair projects.
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Bullet Points

Manual-wind, mechanical movement

10.5”’ diameter, 3.6 mm height

17 jewels, 18,000 vph frequency

47-hour power reserve

Screw balance, Swiss lever escapement

Central sweeping seconds

Fixed or mobile hairspring stud-holder (depending on production date)

Widely used in vintage Swiss watches

The ETA 2390 is a testament to ETA’s engineering legacy, combining practicality and reliability in a compact movement that continues to be valued by horology enthusiasts today.

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The ETA 2391 is a classic manual-wind watch movement produced by ETA, known for its slim profile and reliable performance in vintage timepieces. Designed for small to mid-sized watches, it remains a favorite among collectors and watchmakers for its straightforward construction and historical significance.

Key Specifications

Movement Type: Manual-wind, center seconds

Diameter: Approximately 26mm

Height: Just 3.6mm, making it one of the slimmer manual movements

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Jewels: 17 jewels

Frequency: 18,000 vibrations per hour (A/h)

Power Reserve: Around 48 hours

Notable Features

The ETA 2391 features a simple hour, minute, and center seconds display, without complications.

Many versions were produced with variations in finishing, balance design, and shock protection, depending on the brand and era.

Some models, such as those signed by Wyler, use an “S”-shaped balance arm, which theoretically offers better shock resistance by allowing flexibility during impact.

Usage and Legacy

This movement was widely used by various brands in the mid-20th century, often found in vintage dress watches.

Its slimness and reliability made it suitable for elegant, thin cases, and it remains a sought-after movement for restoration projects.

Bulletin Points

Manual-wind movement, center seconds, 17 jewels

Diameter: 26mm, Height: 3.6mm

Frequency: 18,000 A/h, Power reserve: 48 hours

Simple, robust design, used by multiple brands

Often found in vintage dress watches, popular for restoration
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The ETA 2391 continues to be a respected movement in horology for its simplicity, slim build, and enduring appeal in vintage watch circles.

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