Swiss stainless steel oversized Art déco pocket watch Circa 1935

Oversized steel case pocket watch
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An unusual oversized Art déco steel case pocket watch, made by Omega SA in Biel, Switzerland, circa 1935. The numbered open faced case of this watch was crafted from stainless steel and its silvered dial features Arabic hour numerals, a subsidiary seconds dial at 6 o’clock and Art déco steel hands. The numbered movement has a lever escapement and 15 jewels.
The case, dial and movement are signed.
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Diameter: 56,5 mm
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Weight: 85 g
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Signed: Ω Omega, Swiss
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Acier Staybrite
Acier Staybrite refers to the brand name “Staybrite,” a type of stainless steel developed by the British company Thomas Firth & Sons in 1924 and marketed to the watch industry by their subsidiary, Acier Firth of Zurich, starting in 1931. “Acier” is the French word for steel, so it essentially translates to “Staybrite Steel”. This 18/8 stainless steel alloy was a precursor to the modern SAE 304 stainless steel family and was known for its corrosion resistance and workability, making it popular for watch cases and jewellery.