C. Two-body

C. Two-body, polished, screwed-down case back, lapidated lugs. D. Silver with applied steel faceted baton indexes and luminous dots, outer 1/5th seconds track, subsidiary guilloché dials for the seconds, the 12-hour and 30-minute registers. Luminous steel baton hands. M. Cal. 1873, rhodium-plated, 18 jewels, straightline lever escapement, monometallic balance, shock absorber, self-compensating flat balance spring, micrometer regulator. Dial, case and movement signed. Diam. 35 mm. Thickness 13 mm.