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 · Seamaster 120M
Ref. 25018100
The Omega Seamaster 120M Automatic 36.25 Stainless Steel / Blue takes a 18 mm strap: measure between the lugs and that is the only number you need. We list 31 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 36.25 mm case and 120 m of water resistance, a strap of medium thickness keeps the balance. Most straps here come with quick-release spring bars, so the swap takes a minute and no tool.
Width is a starting point. Check the case and end fittings before choosing.