I offer a rare sample of SEIKO chronograph watches: SEIKO 6139-7060 "Blue Eye" Men's Chronograph from 1970s. It has big steel round face shape case. Movement: Cal. 6139B Japan - 17 Jewels Instructions: Upper button starts and stops chronometer second and lower button reset it after stopping. Pushing crown sets the date and pushing harder sets both of day and date quickly. Case-Size:40.3mm (without crown), Lug-to-Lug:43.7mm Band-Size: Bracelet band fits up to 20.5-21cm (wrist size), Lug:18mm Cond
