Heuer. An 18K gold automatic calendar chronograph wristwatch Model: Carrera Reference: 1158 Date: London Import mark for 1971 Movement: 17-jewel Cal.12, Glucydur balance, automatic Dial: Brushed champagne, applied gilt baton hour markers with black accents, black outer 1/5th second divisions, raised outer tachymetre scale, subsidiary dials at 3 and 9 for 30 minute and 12 hour recording, date aperture at 6, gilt baton hands with black accents and luminous inserts, black centre chronograph hand Case: Polished tonneau form, screw down back, crown at 9, twin fluted chronograph pushers at 2 and 4, No.244039 Strap/Bracelet: Brown leather Buckle/Clasp: Gold plated buckle Signed: Case, dial & movement Size: 38mm Accompaniments: Instruction Manual, Heuer sticker to watchmakers card Footnotes: The Carrera 1158 holds a special place for collectors and is noted as being Jack Heuers favourite model. Not only was Jack enthusiastic about the design but he also connected with these on a much deeper level as he personally presented one to each Ferrari Formula One driver. He is recorded as saying 'These watches have a deep emotional meaning for me, as we have lost drivers to racing accidents. The present lot is from the earliest of the series' being numbered 244029 and the earliest number we have found that have come up for auction. For further information on this lot please visit Bonhams.com