Longines Ultronic chronograph men's wristwatch with steel case measuring 40 x 36 mm (excl. crown) and snap-in steel caseback. Dates back to circa 1975. Historical electromechanical Diapason movement L749.2 based on ESA 9210. Production of the ESA 9210 chronograph in the early 1970s was limited to 21,000 pieces in total, installed by Omega (Speedsonic F 300 Hz cal. 1255), Longines (Chronograph Ultronic cal. 749.2), Baume & Mercier (cal. 19210 and Certina (Chronolympic C-Tronic cal. 749). These models are highly sought-after by collectors from all over the world. Rare white dial (normally black in these models), 3 sub-dials and double date window at 3 o'clock. Shaped case with large moulded chronograph push buttons, original branded crown, snap-in caseback still with the original protective film. Diapason movement, well-preserved and in working order. Barely used item, in excellent condition. Strap length: 24 cm Leather strap and generic steel buckle. Secure shipping via courier with tracking.