Heuer, a gentleman's Autavia Diver 100 automatic calendar chronograph wristwatch, 1970's/80's,

细节
Heuer, a gentleman's Autavia Diver 100 automatic calendar chronograph wristwatch, 1970's/80's,
black dial signed Heuer Autavia, Diver 100, luminous dot five minute markers, luminous Mercedes type hands, subsidiary minute and hour recording dials, date aperture at 6, revolving black bezel, self-winding movement, case with screw back, stainless steel heuer bracelet with divers deployant clasp, diameter of bezel 40mm.