Strap for Seamaster 120M Quartz 36.25 Yellow Gold / Champagne

The Omega Seamaster 120M 2111.11.00 is fitted with 18.00mm lugs, a specific measurement from the 1970s-1980s that reflects the proportional standards of that era. This width is smaller than contemporary standards (20-22mm) and requires specific straps. You can verify by measuring the distance between the case pins with a caliper.

For yellow gold, medium brown or cognac alligator is the ultimate formal choice: the natural grain dialogues elegantly with the precious metal and the patina evolves harmoniously over time. Shell cordovan in burgundy tones represents a highly impactful fine jewelry alternative. For versatility, vegetable-tanned calf in navy blue or black tones offers aesthetic solidity without compromise.

Remove the current strap using a spring bar tool (small specific metal tools). Position yourself at the back of the lug, gently press the spring bar downward to release the end, then repeat on the other lug. Insert the pins of the new strap into the housings and press until the retention click. For precious vintage models, it is recommended to entrust this to a trusted watchmaker.

Yes, provided it has an 18mm lug width. However, given the historical and material value of the watch (yellow gold, chronometer movement), we recommend selecting suppliers of proven artisanal quality. Avoid cheap straps of dubious origin: on a watch of this caliber, the strap is not an accessory but an integral part of the aesthetic and functional value.

A quality leather strap (alligator, shell cordovan, vegetable-tanned calf) typically lasts 3-5 years with daily use, up to 7-10 years with careful maintenance and moderate wear. Durability depends on sun exposure, humidity, sweat and frequency of use. Our artisanal straps come with an 18-month guarantee covering any manufacturing defects.