Strap for Senator Perpetual Calendar Stainless Steel / Silver / Alligator / Pin

The lug width of the Glashütte Original Senator 100-02-22-12-01 is 20mm. This measurement represents the internal distance between the two lugs that support the strap. Accurate measurement is essential before ordering an aftermarket strap to prevent lateral gaps or abnormal pressure on the lugs.

The ideal strap for the Senator 100-02-22-12-01 depends on intended use. For formal elegance, alligator in cognac or chocolate brown tones offers rich patina and construction quality. Vegetable-tanned calf delivers visible ageing over time. A grey steel NATO strap ensures daily versatility whilst maintaining sobriety. All materials must have thickness compatible with the lug housing (3.8–4.2mm) and appropriate deployante or buckle.

To change the strap on the Senator 100-02-22-12-01, use a spring bar tool with proper care. Remove the lateral lugs by sliding the spring bar tool into the small hole beneath the lug. Once the original strap is extracted, insert the new strap, ensuring the pin passes completely through the hole and that the new strap width matches exactly 20mm. We recommend having an authorised Glashütte Original centre perform the first change to avoid stress to the case.

Yes, aftermarket 20mm straps are fully compatible with the Senator 100-02-22-12-01. Verify that the lug width is precisely 20mm, that strap thickness is 3.8–4.2mm, and that the buckle or deployante is proportioned to the 42mm case. Milano Straps offers handcrafted straps in alligator, calf and NATO specifically tested for this measurement.

A quality leather strap (alligator, calf, shell cordovan) lasts 4–7 years with daily wear. Lifespan depends on usage frequency, moisture exposure and tanning method. Vegetable-tanned calf tends to harden less than chrome-tanned leather, extending average life. The buckle or deployante typically wears before the leather: it is often sufficient to replace only the metal components, preserving the original strap.