Omega · Seamaster Diver 300M
Strap for Seamaster Diver 300M Automatic 41.5 Apnea Stainless Steel / Silver / Rubber
Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.
Lug width
Straps for the Seamaster Diver 300M 2895.50.91
Selected for the 20 mm lug width · workshop selection
Military Red Alligator Strap with Blue Stitching€183
Black and Red NATO Strap — Military Heritage€183
Black Crocodile Military Strap with Blue Stitching€183
Black Calfskin NATO Strap 20mm€80
Dark Brown Calfskin Military Strap€80
The Seamaster Diver 300M 2895.50.91, seen from the bench
Frequently asked questions
What is the lug width of the Omega Seamaster Diver 300M 2895.50.91?
The 2895.50.91 features a lug width of 20mm. This width is standard for compatible straps and must be measured precisely between the inner walls of the case lugs, perpendicular to the connecting tube, to ensure perfect mechanical compatibility.
What strap material is recommended for the Omega Seamaster Diver 300M 2895.50.91?
The choice depends on use: vegetable-tanned alligator for elegance and controlled aging; brushed calf for daily urban wear; NATO canvas for military heritage and practicality; satin-finished technical rubber for diving and humid environments. Each material offers specific characteristics of resistance, breathability, and aesthetics.
How do I change the strap on my Omega Seamaster Diver 300M?
Use a dedicated tool (spring bar remover) to remove the elastic pins that secure the strap to the lugs. Press lightly on one side of the pin until it comes out, repeat on the other side, then remove the old strap and insert the new one by entering the pins into the designated grooves. A simple operation but requires care to avoid scratching the case.
Can I use an aftermarket non-Omega strap on my 2895.50.91?
Yes, provided it is 20mm lug width. Aftermarket artisanal straps often offer excellent build quality and customization possibilities superior to official Omega options. It is essential to verify that the deployant (fold-over clasp) is proportionate to the case diameter and that the stitching is robust.
What is the average lifespan of a leather strap for the Omega Seamaster Diver 300M?
A high-quality artisanal alligator or calf strap, with proper maintenance (periodic cleaning, continuous moisture protection), can last 5-8 years. Durability depends on use, climate, frequency of wear, and level of exposure to salt water. Ballistic canvas NATO straps typically last longer (8-10 years), while technical rubber deteriorates after 3-5 years with regular diving.
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

