Strap for Speedmaster Broad Arrow Stainless Steel / Diamond / Black

The lug width of the Speedmaster Broad Arrow 3855.55.11 is 20mm. This measurement is taken between the inner shoulders of the pins that attach the strap to the case. It is a historic measurement derived from the original aviator Speedmaster models, which ensures proportionate integration on the 42mm case and proper clearance for the buckle closure (buckle or deployant).

The best strap for the 3855.55.11 depends on use and aesthetic preference. For maximum technical coherence and visual contrast: black alligator with grey stitching. For those who appreciate aging over time: shell cordovan oxblood or natural brown, which develops warm patina. For daily balance: vegetable-tanned calf in cognac, which ages elegantly. A satin-finished steel deployant is always recommended for closing security.

Strap replacement requires a specific tool (spring bar tool) to free the pins without scratching the case. Position the watch with the case facing up, insert the flat tip of the tool into the small lateral hole of the pin, push downward until the internal spring releases, extract the pin, insert the new strap into the housings and reposition the pin until it clicks into place. Verify there is no movement before wearing. To preserve the satin finish of the steel, it is advisable to contact an authorized Omega service center.

Yes, the 3855.55.11 accepts any strap with 20mm lug width. Quality aftermarket straps (alligator, shell cordovan, vegetable-tanned calf) represent a possible and advantageous evolution compared to the original strap, allowing chromatic and tactile personalization. It is important to verify that the new strap is made with noble leather and that the buckle or deployant is in compatible stainless steel. milanostraps.it offers a specialized selection of customizable 20mm straps and the Casati Milano atelier creates bespoke straps according to your wrist.

A noble leather strap (alligator, shell cordovan, vegetable-tanned calf) on a daily-worn Speedmaster Broad Arrow has an estimated lifespan of 3-5 years, depending on intensity of use, ambient humidity and maintenance. Vegetable-tanned straps, thanks to the absence of synthetic treatments, age while improving aesthetically even beyond this timeframe, developing patina and accentuated tactile softness. Alligator straps maintain their structure for a long time, while shell cordovan can develop fine creases if exposed to very marked cycles of humidity and dryness. Periodic maintenance (gentle cleanser, protection from direct rain) significantly extends the lifespan. Casati Milano guarantees 18 months on all straps made in-atelier.