Heuer. A stainless steel automatic calendar wristwatch
Model: CarreraReference: 1553Date: Circa 1972Movement: 17-jewel Cal.15 automatic, micro-rotorDial: Silvered with grey sector, applied luminous tipped polished baton hour markers with black accents, black outer 1/5th second divisions, raised outer Tachymeter scale to grey surround, subsidiary dials at 3 and 10 for seconds and 30 minute recording, black pointed baton hands with luminous inserts, orange centre chronograph handCase: Brushed and polished tonneau form, screw down back, signed crown at 9, twin chronograph buttons at 2 and 4, No.252571Strap/Bracelet: Blue Tropic rubberBuckle/Clasp: Steel buckleSigned: Case, dial & movement Size: 39mm