The ETA 1170 Watch Movement: A Timeless Classic

The ETA 1170 is a compact, manual-wind mechanical movement renowned for its reliability in ladies’ watches from the mid-20th century. Produced around 1955 by ETA SA Manufacture Horlogère Suisse, it measures 17mm in diameter (about 7.75 lignes), making it ideal for smaller cases.
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Key Specifications

Size and Jewels: 17mm diameter with 17 jewels for smooth operation and reduced friction.

Beat Rate: 18,000 vibrations per hour (A/h), delivering a sweeping center seconds hand for elegant motion.

Power Reserve: Approximately 39 hours when fully wound, suitable for daily wear.

Escapement: Pallet lever design, standard for precision and durability in ETA’s lineup.

Design and Features

This hand-winding caliber features direct center seconds, emphasizing simplicity and efficiency without automatic winding complications. It belongs to ETA’s early postwar family, equivalent to Eterna’s Cal. 1195 in some variants, showcasing shared Swiss horological heritage. Collectors value its slim profile and robust construction, often found in vintage dress watches from brands like Omega or Tissot.
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Historical Context

Introduced in the 1950s, the ETA 1170 reflects post-WWII innovation, prioritizing affordability and serviceability for the growing ladies’ market. Parts like balance staffs and screws remain available today, aiding restoration. Its manual wind appeals to purists seeking mechanical purity.
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Collectibility and Maintenance

Vintage ETA 1170 movements are prized for affordability and easy servicing, with spares supporting long-term preservation. Regular oiling and cleaning ensure decades of accuracy. For enthusiasts, it exemplifies ETA’s foundational role in Swiss watchmaking.

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The ETA 1185 Watch Movement: A Reliable Workhorse

The ETA 1185 is a robust automatic mechanical movement from the renowned Swiss manufacturer ETA SA, part of the Swatch Group, known for powering countless mid-range watches with dependable performance.

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Key Specifications

Type: Automatic, self-winding with manual winding option.

Diameter: Approximately 25.6 mm (11.5 lignes), fitting standard 40mm watch cases.

Height: Around 5.25 mm, slim for versatile case designs.

Jewels: 25 synthetic rubies for reduced friction.

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

Power Reserve: 38 hours, suitable for daily wear.

Functions: Hours, minutes, central seconds, date at 3 o’clock.
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Design and Features

This movement belongs to ETA’s 1100/2800 family derivatives, featuring a glucydur balance wheel and anachronistic regulator for precise adjustments. It includes ETA’s Incabloc shock protection system, ensuring durability against daily shocks. The nickel-finished bridges and plates offer corrosion resistance, while the bidirectional rotor winds efficiently during wrist movement.

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Reliability and Usage

Widely used in brands like Tissot, Longines, and Certina during the 1990s-2000s, the 1185 earned a reputation for serviceability and affordability. Its ETA 2824-2 base allows easy sourcing of spare parts from suppliers like Perrin Watch Parts. Though phased out post-2010s for Sellita alternatives, serviced units remain accurate to +6/-4 seconds per day.

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Service and Legacy

Regular servicing every 5 years maintains its performance, with parts availability supporting vintage restorations. The 1185 exemplifies ETA’s role in democratizing Swiss mechanical watchmaking, blending affordability with quality engineering.

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ETA Watch Co.: The Cornerstone of Swiss Watch Movement Manufacturing

ETA SA is a historic and dominant Swiss watch movement manufacturer, whose roots trace back to the mid-19th century. It is widely recognized for supplying reliable, precise, and affordable mechanical and quartz movements to numerous renowned Swiss watch brands and is a wholly owned subsidiary of the Swatch Group.
Key Highlights

Founded: Officially established in 1932 as ETA SA, but its origins date back to 1856 in Grenchen, Switzerland, when Urs Schild, a schoolmaster, and Dr. Joseph Girard founded a watch movement factory that later became Eterna and eventually evolved into ETA