A highly sought-after 1970s Swiss-made Sicura "Super Waterproof 400" vintage skin-diver tool watch. This timepiece features a rugged 38.0 mm case size with a highly versatile 20.0 mm lug width and a 46.0 mm lug-to-lug layout. The matte black dial remains beautifully preserved with its distinctive tritium 12-6-9 configuration, crosshair sub-seconds scale, framed date window at 3 o'clock, and signature oversized "broad arrow" minute hand. The screw-down stainless steel case back is prominently embossed with the iconic Sicura coat of arms flanked by twin seahorses. Condition & Strap Sizing Report The watch is in an honest, unpolished vintage state, showing uniform signs of intensive wear that tell its history. The chrome-plated mid-case profiles show edge wear and minor plating pitting, particularly near the crown and lug tips. The bidirectional dive bezel insert displays surface scratches, and the original acrylic crystal has hairline storage scuffs. The movement is operational, with the date wheel clicking over cleanly.