Strap for Seamaster 120M Automatic 36.25 Stainless Steel / Yellow Gold / White

The lug width of the Seamaster 120M 2301.21.00 is 20mm. This measurement should be verified with a caliper at the base of the spring bar: the distance between the inner edges of the holes must be 20.00 mm ±0.1 mm. Do not confuse with 18mm or 22mm straps, which are not compatible.

For the two-tone yellow gold/steel case, we recommend alligator in dark brown (vegetable tanning) or cognac calf leather with a deployant clasp. Alligator enhances the natural grain without visually competing with the watch, while calf develops a golden patina over time. Shell cordovan in burgundy tones is a sophisticated option for collectors who appreciate character development.

The lugs are fixed and not removable. To change the strap, extract the spring bars from the lug holes using a spring bar tool. Insert the spring bars into the new strap ensuring they lock completely in their seats. Verify that the strap is indeed 20mm before proceeding.

Yes, provided it is certified 20mm and of artisanal quality. MilanoStraps straps are made from natural leather (alligator, calf, shell cordovan) and crafted with custom-fitted deployant clasps in gold or steel. We guarantee geometric compatibility and durability over time thanks to vegetable tanning and handstitched seams.

An artisanal natural leather strap (alligator, calf, or shell cordovan) lasts 4-7 years with daily wear, depending on humidity, perspiration, and maintenance. Vegetable tanning slows wear compared to modern tanneries. The leather ages gracefully, developing a golden patina. MilanoStraps covers its straps with an 18-month warranty against manufacturing defects.