Sicura Submarine 400 – 1970s – 39 mm A charismatic vintage Sicura Submarine 400 from the 1970s, combining bold dive-watch styling with the distinctive character that made Sicura a cult favorite among collectors. A strong example with excellent original details and a beautifully preserved dial. Specifications Brand: Sicura Model: Submarine 400 Decade: 1970s Case width: 39 mm Lug width: 20 mm Thickness: 11.3 mm Case material: Chrome-plated case Dial: Black glossy dial with original tritium lume Bezel: Smooth bi-directional rotating bezel (no clicks; rotates freely but not loose) Bracelet: Steel stratch Functions: Hours, minutes, seconds, date Description This 1970s Sicura Submarine 400 captures the adventurous spirit of the era with its bold proportions and unmistakable vintage-dive aesthetic. The glossy black dial is exceptionally well preserved, featuring perfectly aged tritium lume on both indices and hands. Its chrome-plated case and smooth bi-directional bezel give the watch a distinct tool-watch feel. The bezel rotates both ways without click positions—standard for many Sicura models of this era—yet remains firm and secure. A standout piece for vintage dive-watch enthusiasts and Sicura fans alike.