Stainless steel, manual-winding, tonneau-shaped, military-type pilot’s wristwatch, water-resistant with case-back screwed by four screws, black colour dial with subsidiary seconds at 9 and two horological complications:
• Fly-back “retour en vol” 1/5 second chronograph (activated by the two round-shaped push-pieces)
• Half-instantaneous 30-minute counter (subsidiary dial at 3 o’clock)
Grading System: AA
EUR 2,300 - 4,600
USD 2,800 - 5,500
HKD 21,300 - 42,500
Brand Heuer, La Chaux-de-Fonds
Reference 1550 SG
Year circa 1970-1980
Case No. 8 471 (by Heuer-Leonidas S.A.)
Bracelet green tissue strap
Buckle stainless steel buckle
Diameter 42.8 mm. (bezel)
Caliber 13’’’ (based on Valjoux 230 by Reymond Frères, Les Bioux, Vallée de Joux)
Dimensions 51.5 x 43.1 mm
Signature dial and case
Sold: EUR 2,860