9. 9Ω Omega. A steel manual wind chronograph wristwatch Date: Circa 1940 Movement: 17-jewel Cal.33.3 manual wind, No.9386614 Dial: Black, white Arabic numeral hour markers, white outer 1/5th second divisions, outer tachymetre scale, inner telemetre scale, subsidiary dials at 3 and 9 for running seconds and 30 minute recording, syringe hands, centre chronograph hand Case: Brushed and polished round, snap on back, crown flanked by twin pushers, No.9977372 Strap/Bracelet: Black faux crocodile leather Buckle/Clasp: Steel buckle Signed: Case, dial & movement Size: 38mm The Omega Calibre 33.3 chronograph is one of the Manufacture's most emblematic creations. Introduced in the 1930s, it quickly gained acclaim for its precision and refined aesthetics. Equipped with a column-wheel movement, it exemplifies the technical mastery of its era. Its dials, often two-tone or sectorized, offer remarkable legibility and timeless style. Highly prized by enthusiasts and collectors, it played a key role in establishing Omega's reputation in chronograph making. Each piece reflects a subtle balance between functionality and elegance. Its understated and harmonious design continues to make it a sought-after treasure on the vintage market.The Calibre 33.3 remains today a true benchmark of classic watchmaking.