Omega Marine Standard – 1930 – Ref. 146310 / 567213 – Patented Water-Resistant A historic Omega Marine Standard from 1930, one of the first true diving watches. Featuring a patented water-resistant snap-on case back and subsidiary seconds at 6 o’clock, this watch is a remarkable piece of horological history. Fully checked by a watchmaker and in excellent condition for its age. Specifications Brand: Omega Model: Marine Standard Reference: 146310 / 567213 Case size: Classic vintage dimensions Dial: Original with subsidiary seconds at 6 Movement: Mechanical manual wind Case: Patented water-resistant snap-on back Gender: Unisex / Men Condition: Excellent vintage; watchmaker checked Description The 1930 Omega Marine Standard is one of the earliest diving watches, pioneering water-resistant design in wristwatches. Its patented snap-on case back ensured protection against moisture, while the subsidiary seconds at 6 o’clock adds to its classic charm. A watch with immense historical significance, ideal for collectors seeking a rare and elegant vintage diving timepiece.