10. 10Ω Omega. A stainless steel manual wind chronograph wristwatch Date: Circa 1940 Movement: 17-jewel Cal.33.3 manual wind, No.9388643 Dial: Two tone silvered, black baton hour markers, Arabic numeral 12 and 6, faded inner tachymetre spiral scale, black outer 1/5th second divisions, faded outer telemetre scale, subsidiary dials at 3 and 9 for running seconds and 30 minute recording, blued steel syringe hands, centre chronograph hand Case: Brushed and polished round, fancy t-bar lugs, snap on back, crown flanked by twin pushers, No.9555231 Strap/Bracelet: Grey faux lizard leather Buckle/Clasp: Steel buckle Signed: Case, dial & movement Size: 37mm The Omega Calibre 33.3 chronograph stands as one of the Maison's most iconic timepieces. Launched in the 1930s, it quickly earned recognition for its precision and sophisticated design. Featuring a column-wheel movement, it embodies the technical excellence of its era. Its dials, often presented in two-tone or sector layouts, combine exceptional legibility with timeless elegance. Favored by collectors and connoisseurs alike, it played a pivotal role in cementing Omega's reputation in chronograph craftsmanship. Each watch reflects a perfect harmony of functionality and style. Its refined and balanced design continues to captivate the vintage market. Today, the Calibre 33.3 remains a definitive reference in classic watchmaking.