Swiss unusual stainless steel and Tudor precision lapel watch Circa 1930

Keyless lapel watch with a brown leather cord and steel brooch
–
A fine rare and unusual, stainless steel and Lucite keyless lapel watch with a brown leather cord and steel brooch accompanied by the original hang tag. Three body steel case embedded into a square Lucite frame with black bezel with radial Arabic numerals and transparent case back.
Matte silver dial with painted baton indexes, outer minute track and blued steel baton hands. Rhodium-plated movement with 17 jewels, straight-line lever escapement, monometallic balance, self-compensating flat balance spring and an index regulator.
Dial and movement signed.
–
Dimensions: 36 x 36 mm
–
Thickness: 10 mm
–
Signed: Tudor