GOLD SILVER WITH CHRONOGRAPH, 50S Three body tonneau 18K gold case, n. 102-B, slopped bezel, concave lugs, snap on back, rectangular pusher. Not original strap and buckle.
Silvered dial signed, applied triangular and Arabic indexes, minute and 1/5th of second divisions, subsidiary dials with concentric engravings for seconds and 30-min register, tachymetric scale. Gilt Regate hands.
Manual winding movement signed, copper-plated caliber Landeron 248, 17 jewels, metal dustcover, lever system for the chronograph, lever escapement, monometallic balance with screws, blued flat hairspring, Incabloc shock-absorber.
Diameter Ø: 37,5 mm 
Note: working, but to be serviced.