Strap for Seamaster Aqua Terra 150M Co-Axial 39.2 Railmaster Yellow Gold / Brown Alligator / China Train

The lug width of the Railmaster 2608.52.31 is 20 mm, measured center-to-center between the case lugs. This is a specification of the original Railmaster collection and differs from modern standards: it requires precise verification with a digital caliper to exclude approximations. Consult our lug width measurement guide in the technical glossary.

Alligator in dark shades (Brown, Mocha, Teak) is the natural aesthetic choice for the 2608.52.31: its fine grain elegantly contrasts with the satin-finished texture of yellow gold, amplifying its warmth. Alternatively, shell cordovan or Cognac calf offer sophistication, while NATO and rubber represent more sporty and contemporary choices.

The change is made by extracting the spring bars from the case lugs. Use a dedicated tool (spring bar tool) to avoid damaging the pins: apply light downward pressure on one of the two spring bars, remove the old strap and insert the new one aligning it correctly. If you lack experience, consultation at Casati Milano ensures professional installation without risk.

Yes, straps with a 20 mm lug width are compatible. Compatibility depends on the precision of the lug width: always verify before purchase or contact our team for technical advice. Milanostraps offers a wide selection of customizable 20 mm straps, ready for shipment.

A quality artisanal alligator strap has an average lifespan of 3-5 years with moderate daily use. Shell cordovan and vegetable tanning tend to last longer thanks to their dense fibrous structure. Longevity depends on use, care (protection from water and moisture) and leather quality. Casati Milano offers an 18-month warranty and after-sales service for maintenance and possible replacements.