This is an automatic winding one button chronograph by SEIKO from 1974. The watch measures 40mm. across and 42mm. top to bottom. The silver dial with blue 1/5th. second scale, 30 minute chrono register and quickset day/date readout with original baton hands looks great. This date can be quickset by depressing the original flush-fit setting crown. The automatic winding SEIKO movement was just cleaned and operating smoothly. The steel case has never been polished-original. The original bracelet is also in very good condition. Thee models are highly collected.