Tutorial 6 min read
Omega Speedmaster watch strap guide
One black dial, four different directions. Explore suede, nylon, rubber and woven straps, starting with the 20 mm lugs of a specific Moonwatch reference.
Omega · Railmaster
Seamaster Aqua Terra 150M Co-Axial 42.2
Ref. 28025231
Watch details and strap advice
- Case diameter
- 42.2 mm
- Case material
- Stainless Steel
- Case shape
- Round
- Water resistance
- 150 m
- Caliber
- 2403
- Dial
- Black
The Omega Seamaster Aqua Terra 150M Co-Axial 42.2 Railmaster / Black Alligator takes a 21 mm strap: measure between the lugs and that is the only number you need. We list 6 straps in that width. Built for water, it wears naturally on rubber or a nylon NATO; a leather strap keeps it for dry days. With a 42.2 mm case and 150 m of water resistance, a thicker strap balances the case. Most straps here come with quick-release spring bars, so the swap takes a minute and no tool.
Straps by lug width (21 mm) 6
All 6 21 mm strapsWidth is a starting point. Check the case and end fittings before choosing.
-
Deployant RubberRubber€49.90 -
Sailcloth WeaveNylon€27.90 -
Suede RallyLeather€34.90 -
Classic EmbossedLeather€24.90 -
Epsom GrainLeather€27.90 -
Heritage SuedeLeather€29.90
Read before you choose
All stories
Tutorial 3 min read
Choosing a NATO strap or a two-piece strap
Learn how NATO and two-piece straps attach to your watch, affect wrist height, and provide security so you can choose the right style.
Tutorial 6 min read
How to change a watch strap
Identify the attachment, release the correct part and check that both tips are seated. Illustrated instructions for quick-release bars, conventional bars and nylon pass-through straps.