Rolex, a gentleman's stainless steel automatic wristwatch, Model: Oyster, Ref:1858, circa 1940,

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Rolex, a gentleman's stainless steel automatic wristwatch, Model: Oyster, Ref:1858, circa 1940,
silvered dial with baton markers and Arabic quarters, subsidiary seconds, blued steel hands, self-winding movement, Oyster case with screw down winding crown, milled edge screw back, dial, movement and case signed, 30mm.
See Colour Illustration (Plate 15)