OMEGA REF. ST 105.012, CHRONOGRAPH, MINUTE AND HOUR RECORDERS, CALIBRE 321, “HF” CASE; “SPEEDMASTER PROFESSIONAL”; STAINLESS STEEL | Important Modern & Vintage Timepieces | Monaco Auction
OMEGA REF. ST 105.012, CHRONOGRAPH, MINUTE AND HOUR RECORDERS, CALIBRE 321, “HF” CASE; “SPEEDMASTER PROFESSIONAL”; STAINLESS STEEL, Stainless steel, manual-winding, “tonneau”-shaped, gentleman’s wristwatch, water-resistant with screwed case-back, bezel with black insert, black colour dial with subsidiary seconds at 9, 1/5 second chronograph with tachometric scale graduated on the bezel for 500 units per hour, half-instantaneous 30-minute recorder, 12-hour recorder.
