Strap for Mission Timer U2 S

The lug width of the Sinn 1020.020 is 22mm. This measurement is taken between the inner shoulders of the lugs (from pin to pin). Precise measurement is essential: even a 0.5mm discrepancy can cause friction against the case or excessive play in the stainless steel lug.

The choice depends on usage: for frequent diving, vulcanised high-density rubber offers absolute practicality and baric resistance. For daily professional use, American alligator with vegetable tanning provides elegance and natural patina development. Tight-weave silk NATO remains the versatile solution for those seeking tool-free strap changes.

The procedure requires a simple tool: a diamond-tipped strap tool or small flathead screwdriver. Apply gentle pressure to the spring pin from the rear of the case, sliding it laterally until completely removed. Position the new strap on the lug and reinsert the pin until it clicks into position. Avoid forced movements: the 22mm pin has precise tolerances.

Yes, provided the strap is specifically engineered for 22mm lug width. Verify that the lug holes have an internal diameter of at least 1.5mm and that the curvature of the transverse section does not conflict with the domed case shape. Soft leather straps may create lateral play in the cylindrical stainless steel lug.

With quality leather (alligator, chromium-tanned calf), subjected to occasional diving and correct post-immersion drying, average lifespan is 2–3 years. If exposed to constant humidity, frequent baric pressure, or rapid sun-drying, longevity decreases to 12–18 months. Natural rubber resists 4–5 years in marine conditions; synthetic NATO 6–8 years with moderate UV exposure.