Strap for Speedmaster Professional Moonwatch Apollo - Soyuz 25th Anniversary

The Omega Speedmaster Moonwatch Professional 3695.59.31 has a lug width of 20 millimetres. This precise dimension corresponds to the width of the space between the case lugs and is essential to guarantee compatibility and proper fit of any aftermarket strap. A 20mm strap must fit into the Omega attachments with minimal tolerance, verifiable with a digital calliper by measuring the distance between the right and left inner edges of the lug.

For the 3695.59.31 in yellow gold, alligator with vegetable tanning is the primary choice: the regular scale texture naturally complements the case geometry, and the patina developed over time reflects the ageing of the gold. Alternatively, natural burgundy shell cordovan creates an organic pairing with the warmth of gold, while dark brown calfskin offers sober elegance for formal occasions. Deep black vulcanised rubber remains the sport solution for nautical use.

The strap on the Omega Speedmaster Moonwatch 3695.59.31 is changed by extracting the pins that secure the lugs to the case lugs. Use a dedicated spring bar tool or pin pusher, inserting the tip into the tiny hole at the base of the lug and pushing the pin outward. Once the pin is free, the strap will come off easily. To install the new strap, align the holes, reinsert the pin and verify that it is fully secured. This operation requires delicacy, especially on yellow gold cases, to avoid scratches.

All artisanal straps made with a 20 millimetre lug width are compatible with the 3695.59.31, provided the width respects the maximum tolerance of 0.5 millimetres per side. On milanostraps.it, straps in alligator, shell cordovan, calfskin and vulcanised rubber are available, all in the 20mm size, customisable in colour, leather type, length and stitching. The Casati Milano atelier can also create bespoke straps with direct consultation via WhatsApp.

A natural leather strap with vegetable tanning has an average lifespan of 3–5 years of daily use, dependent on climate, humidity and frequency of use. Alligator and shell cordovan, being dense and fibrous leathers, tend to last toward the upper end of this range. Calfskin is more sensitive to humidity and requires greater maintenance. All artisanal straps supplied by milanostraps.it and created at Casati Milano enjoy an 18-month warranty against manufacturing defects and can be regenerated through professional reconditioning at the end of their first service life.