Stainless Steel Watch Case Back (Fond Acier Inoxydable)
Horological Component / Watch Case Part · Unknown French or Swiss manufacturer; common among mid-market brands like Lip, Yema, or generic private labels using French-language marking conventions.
Pattern: Standard utilitarian snap-on or screw-down utility case back; typical of mass-produced mid-century timepieces.
Type
Horological Component / Watch Case Part
Maker
Unknown French or Swiss manufacturer; common among mid-market brands like Lip, Yema, or generic private labels using French-language marking conventions.
Material
Stainless Steel (Acier Inoxydable); contains 0% silver. This is a common misconception where polished steel is mistaken for a precious metal.
Dimensions
Estimated diameter 30-36mm (standard men's or large unisex watch size); weight approximately 5-8 grams.
Description
This is a circular stainless steel case back from a vintage wristwatch. It is not silver. The French inscription 'FOND ACIER INOXYDABLE' translates to 'Stainless Steel Back,' indicating that while the watch case itself might have been plated (gold or chrome), the back was made of durable, hypoallergenic steel. The number '1122' is a model reference or production sequence number.
Key Features
French terminology; four-digit reference number; brushed metallic surface; absence of precious metal hallmarks.
Material & Composition
Stainless Steel (Acier Inoxydable); contains 0% silver. This is a common misconception where polished steel is mistaken for a precious metal.
Finish & Decoration
Vertical brushed (satined) finish on the exterior; high-speed lathe-turned or stamped markings; industrial aesthetic.
Hallmarks & Stamps
Stamped 'FOND ACIER INOXYDABLE' (Stainless Steel Back) and serial/reference number '1122'. No silver purity hallmarks (like the Minerva head or .925) are present.
Construction Details
Die-stamped or machine-pressed from a sheet of stainless steel; features a circular profile designed to friction-fit or screw onto a watch mid-case.
Functional Features
Threaded or snap-neck rim to provide a water-resistant seal for a watch movement; protects internal mechanical or quartz components.
Handle & Grip Details
Not applicable as this is a watch component; however, it may feature a small 'lip' for a case-opening tool.
Craftsmanship Details
Functional, industrial-grade stamping; consistent with mass-production standards of the mid-20th century watch industry.
Authentication Indicators
The stamp 'ACIER INOXYDABLE' is the primary indicator of material; it explicitly denies the presence of silver. The wear pattern is consistent with long-term wear on a wrist.
Origin & Manufacturing
Likely France or Switzerland, given the French text; manufactured in a factory specializing in watch 'habillage' (external parts).
Era & Period
Mid-20th Century (approx. 1950s-1970s), evidenced by the font style and the French terminology prevalent in European watchmaking of that era.
Age Estimate
Circa 1960-1975 based on the block serif typography and the reference number style.
Cultural Significance
Represents the post-war boom of affordable European mechanical watches marketed to the middle class.
Condition Notes
Fair to Good. Significant surface scratching (scuffing) and some pitting or oxidation spots (black dots) which are common when steel reacts to prolonged contact with skin acidity/perspiration.
Value Estimate
Minimal ($5 - $20 USD) as a replacement part; value lies entirely in the watch movement and dial it originally protected, rather than the metal content.
Care & Maintenance
May be cleaned with a soft toothbrush and mild soap; light scratches can be removed with a jewelry polishing cloth or fine abrasive paste, but this will not increase value as it is a base component.
Similar Pieces
Often confused with coin silver or .800 silver watch backs; however, silver backs almost always carry a small hallmark (like a grouse or crab in French/Swiss contexts) and are softer.
Interesting Facts
In the vintage watch world, 'Fond Acier Inoxydable' often appeared on watches where the rest of the case was 'Metal Chrome' or 'Plaqué Or' (gold plated), as steel was harder and better for skin contact.