Released in 1998 to celebrate the 50th anniversary of the Omega Seamaster line, the Seamaster 300 GMT (Ref. 2534.50.00) was Omega's first dedicated GMT travel watch, featuring the COSC-certified Caliber 1128 automatic movement with a 44-hour power reserve and a bi-directional 24-hour rotating bezel. The caseback bears a special '50th Anniversary' engraving, making this a historically significant and increasingly collectible piece. This example received a full overhaul in April 2026 and has been timegrapher-tested at +1 sec/day.
| Brand | Omega |
| Model | Seamaster 300 GMT 50th Anniversary |
| Reference | 2534.50.00 |
| Movement | Automatic, Caliber 1128, COSC Chronometer |
| Case Size | 41 mm |
| Case Material | Stainless Steel |
| Dial Color | Black |
| Crystal | Sapphire |
| Water Resistance | 300 m (30 bar / 1000 ft) |
| Band Material | Stainless Steel |
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