Omega · Speedmaster (Non-Moonwatch)
Strap for Speedmaster Date 39 Stainless Steel / Silver
Takes 18 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Speedmaster (Non-Moonwatch) 3813.30.01
Selected for the 18 mm lug width
Vintage Brown Calfskin Strap — Natural Patina€98
Hammered Pink Strap with Ecru Stitching€98
Hammered Yellow Strap with Ecru Stitching€98
Grey Hammered Leather Strap with Ecru Stitching€98
Swift Red Leather Strap€120
Hammered calfskin strap in cuoio€98
The Speedmaster (Non-Moonwatch) 3813.30.01, seen from the bench
Frequently asked questions
What is the lug width of the Omega Speedmaster 3813.30.01?
The Omega Speedmaster 3813.30.01 has a lug width of 18 millimetres. This width is measured between the two spring bar holes on the case lugs and determines compatibility with aftermarket straps. Always verify this dimension before purchasing a strap for your watch.
What is the best strap for the Speedmaster 3813.30.01?
The choice depends on intended use. For formal contexts, black or medium-brown alligator is ideal. For daily wear, vegetable-tanned calf leather offers a fascinating patina development. For sports and durability, black canvas nato or FKM rubber are the most practical solutions. Shell cordovan represents the premium option for those seeking leather that ages visibly and fascinatingly.
How do you change the strap on the Omega Speedmaster 3813.30.01?
Strap replacement requires a precision tool to extract the spring bars from the lugs. Position the watch on a soft cushion with the dial facing down. Insert the spring bar tool into the slot above the pin, apply gentle pressure to release the internal spring, and extract the pin. Repeat on the other side. Position the new strap's pins into the same holes and press until they lock. If unsure, consult a professional.
Can I use quality aftermarket straps on this watch?
Absolutely. The Omega Speedmaster 3813.30.01 with 18mm lugs is fully compatible with quality artisanal straps. Alligator, vegetable-tanned calf, shell cordovan or FKM rubber straps offer complete customization of the watch, allowing you to adapt the chronograph to different contexts while maintaining the same case and movement.
How long does a natural leather strap last on a chronograph like the 3813.30.01?
A premium vegetable-tanned calf strap can last 3 to 7 years with daily wear, depending on exposure frequency to moisture, sunlight and chemical agents. Alligator tends to last longer thanks to skin density. Shell cordovan, being denser, can exceed 10 years. Regular maintenance – drying after rain, treating with specific balms once a year – significantly extends the strap's useful life.
The next step
The right strap isn't chosen. It is built, together.
From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.
Request an appointment →Casati Milano · Via XX Settembre 15, Milan · by appointment only

