Omega Speedmaster '57 Specifications - Lug Width & Strap Size
The Omega Speedmaster '57 watch has a 20mm lug width and is compatible with 20mm watch straps.
The Omega Speedmaster '57 case size is 40.5mm in diameter and 13mm thick.
The Omega Speedmaster '57 has a lug to lug measurement of 49.6mm.
The Omega Speedmaster '57's reference number: 332.10.41.51.01.001
Shop 20mm watch straps for Omega Seamaster Aqua Terra 150M 41