Strap for Seamaster Diver 300M Automatic 28 Yellow Gold / White / Bracelet

The lug width is 20mm. This measurement must be verified by measuring the external distance between the two horizontal pins that exit the case. A compatible strap must have the two spring bar slots spaced exactly 20mm to ensure precise fitting.

For a 2172.70.00 in yellow gold, we recommend black or cognac alligator for sharp, modern contrast, or vegetable-tanned calf in dark brown tones for a balance between elegance and character. Shell cordovan represents a premium choice for those seeking superior construction density and moisture resistance.

To change the strap, you must extract the spring bars from the case using a dedicated tool (spring bar tool). Position the tool in the lateral slots of the case and apply gentle inward pressure to retract the two elastic ends of the pin. Once the spring bars are extracted, you can remove the old strap and insert the new one, verifying that the fitting is precise on the 20mm lug width.

No. Although 20mm is a common standard, it is essential to verify that your watch was originally designed for this lug width. In the case of the Omega Seamaster Diver 300M 2172.70.00, 20mm is the correct measurement. Always consult your model reference or measure the distance between the spring bar slots before purchasing a strap.

A quality artisanal leather strap made with materials such as alligator or vegetable-tanned calf typically lasts 3-5 years under normal use conditions. If the watch is frequently exposed to water or humidity, it is advisable to opt for rubber or technical fabric straps. Our straps benefit from an 18-month warranty and special treatments that extend longevity.