Case: Four-body, "bassine", polished, button at 2 for the start/stop and return-to-zero functions of the chronograph. Hinged gold cuvette engraved with prize medals and technical details, transparent inner case back. Dial: White enamel with Breguet numerals, outer minutes track and 1/5th of a second chronograph divisions, subsidiary seconds dial. Gold "spade" hands. Movement: Cal. 20۪۪۪, frosted gilt, 17 jewels, straight-line lever escapement, monometallic balance, self-compensating Breguet balance spring, index regulator, visible chronograph work, repeating on gongs activated by a push-button in the band. Dial and cuvette signed. Dial, case and movement in good condition. Diam. 57 mm.