3107. Heuer. A gilt and stainless steel automatic calendar chronograph wristwatch Model: Carrera Reference: 110.255 Date: Circa 1970 Movement: 17-jewel Cal.12 micro-rotor automatic Dial: Champagne and black, applied gilt baton hour markers, black outer 1/5th second divisions, raised outer tachymetre scale, black subsidiary dials at 3 and 9 for 30 minute and 12 hour recording, date aperture at 6, polished pointed hands with luminous inserts, centre chronograph hand Case: Brushed and polished tonneau form, screw down back, crown at 9, chronograph pushers to band at 2 and 4 Strap/Bracelet: Black leather Buckle/Clasp: Signed gilt buckle Signed: Case, dial & movement Size: 38mm x 43mm