BREITLING intermediate wheel chronograph Navitimer, manual winding, Switzerland around 1967, reference 816, stainless steel case including NSA bracelet, screwed down case back, display of hours, minutes, constant second & chronograph, movement copper coloured, 17 jewels, calibre Venus 178, flat rim balance, Breguet balance-spring, incablock shock-absorber, diameter approx. 48 mm, length approx. 18 cm, condition case 2-3, condition movement 2, property of a collector