Strap for Senator Observer Stainless Steel / Grey / Calf / Folding

The lug width is 21 mm. This width is determined by the spacing between the lugs of the case and represents the specific standard for the Senator model with a 44 mm case. It is essential to measure correctly by positioning a calliper between the internal axes of the lugs perpendicular to the dial.

For the Senator 100-14-02-02-55, alligator straps are recommended (black, dark brown, burgundy) which enhance the chromatic contrast with the steel case, or shell cordovan with vegetable tanning to evolve over time. Calf leather with vegetable tanning in grey or terracotta tones offers a contemporary effect. For sport contexts, NATO canvas or FKM rubber are excellent alternatives. The choice depends on intended use and personal aesthetic preferences.

To change the strap on a watch with 21 mm lugs, use a dedicated tool (spring bar tool) to compress the spiral spring fixing the lug pin. Position the tool in the pin slot, compress the spring, and slide the old strap outward. Once released, insert the new strap by aligning the hole with the pin, then release the spring. Ensure the spring is completely seated in its slot on the case.

Yes, any strap with a 21 mm lug width is compatible with the Senator 100-14-02-02-55. Milano Straps offers a complete selection of artisanal 21 mm straps in various materials (alligator, cordovan, calf, NATO, rubber) specifically verified for perfect fit. The important thing is to ensure that the internal width of the lugs is actually 21 mm before purchase.

The lifespan of a leather strap depends on intensity of use, climatic conditions, and material. A quality alligator strap with vegetable tanning typically lasts 5-7 years with daily use; shell cordovan has similar lifespan but the patina improves with ageing. Calf leather with vegetable tanning tends to be slightly shorter (4-6 years) but evolves aesthetically over time. To extend strap life, store it away from excessive moisture and prolonged direct sun exposure.