• 16.5''' lever movement, 17 jewels, bi metallic compensation balance, single button chronograph mechanism • silvered dial, applied yellow gold baton indexes, yellow gold hands, engine turned subsidiary dials for constant seconds and 30 minute register, outer minute track with black painted Arabic divisions, outermost blue tachometer scale • 18k yellow gold case, pusher through the crown, personally inscribed snap on case back • case, dial, and movement signed