GAGNEBIN & CO WITH MONOPUSHER CHRONOGRAPH, 40S Three body circular stainless steel case, curved and concave lugs, flat bezel, snap on back n. 136830. Not original strap and buckle.
Silvered dial signed, bâton indexes with engraved and painted Arabic numerals, minutes/seconds division, outer telemetric and inner snail tachymetric scales, sunk subsidiary dials for the seconds and the 30-min register. Blued moderns hands.
Manual winding movement, based on Valjoux, nickel-finished, fausses-côtes decoration, 17 jewels, lever escapement, monometallic balance with screws, blued Breguet hairspring. 
Diameter Ø: 38 mm
Note: to be serviced.