Omega Watch Straps

The right replacement strap starts with the lug width. The Seamaster Diver 300M (42mm, post-2018) takes a 20mm strap, as does the Seamaster Aqua Terra 41mm. The Aqua Terra 38mm takes 19mm. The Seamaster 300 (41mm) takes 21mm. The Seamaster Railmaster (38mm) takes 19mm. The Speedmaster Professional Moonwatch (42mm) takes 20mm. If you are working from a vintage Omega reference, lug widths range from 17mm to 20mm depending on the model and era.

For material, FKM rubber suits the Seamaster Diver 300M and Speedmaster best — both are tool watches that benefit from a strap that handles water, sweat and daily wear without degrading. Leather and suede suit the Aqua Terra, Constellation and De Ville, where the case finishing is more refined and the wearing context is less likely to involve saltwater. NATO and fabric work across the full range and are the lightest option for travel or warm weather.

How do I change an Omega watch strap?
Use a spring bar tool to compress the spring bars at the lug ends and slide the strap free. If your replacement strap comes with quick-release spring bars pre-installed, no tool is required — press the release tab on the underside of the strap and the bar compresses manually. The whole process takes under a minute either way.

How do I remove the original Omega bracelet before fitting a strap?
Removing a metal bracelet from an Omega requires a dedicated bracelet removal tool. Unlike a standard spring bar tool, this adjustable tool places even pressure on both spring bar shoulders simultaneously, giving you controlled, scratch-free removal without risking damage to the lugs. It also comes with a free strap up to £85.

Choosing the right aftermarket omega watch strap starts with the model. The Speedmaster Professional takes a 20mm strap and suits FKM rubber or calfskin leather best — both handle the chronograph's tool-watch character without compromising the case finishing. The Seamaster Diver 300M is the same 20mm lug width and pairs well with FKM rubber or sailcloth for active wear, or alligator-embossed leather when the occasion calls for it. The Aqua Terra runs 19mm or 20mm depending on the case size and suits suede or smooth calfskin. Every omega strap replacement in this collection is cut to the correct lug width for each reference, so compatibility is confirmed before you buy. Free UK delivery on all orders. Ships in 24 hours.