Strap for Senator Chronometer Regulator White Gold / Silver / Alligator / Folding

The lug width of the Senator 1-58-04-04-04-04 is precisely 21mm. Measurement is taken between the spring bar holes, perpendicular to the case. This is a non-standard specification in the aftermarket, so verification before purchasing a replacement strap is essential. Straps sized 20mm or 22mm will not provide correct fitment.

For the white gold Senator 1-58-04-04-04-04, alligator leather remains the most elegant choice: the natural texture of the skin dialogues perfectly with the geometric purity of the case. Vegetable-tanned calf offers an alternative for those seeking authentic character and patina development over time. NATO straps provide a practical solution for sports contexts without compromising durability.

Remove the watch from the wrist. Locate the spring bar holes on each lug. Using a spring bar tool, press gently toward the case centre, allowing the lever to access the mechanism. Extract the spring bar with fluid motion. Repeat on the opposite side. Install the new strap by reversing the procedure: thread the spring bar through the strap lug, press gently, and insert into the case seat. The bar must click firmly into position. Avoid hammers or improper tools that risk scratching the gold.

Yes, provided it is specifically manufactured to 21mm specification. Quality aftermarket straps designed for this lug width integrate seamlessly. MilanoStraps offers a dedicated collection of 21mm-width straps in alligator, calf, and NATO, customisable and ready for dispatch. Always order by correct lug width specification, not by watch model, to ensure optimal fitment.

A quality artisan alligator or vegetable-tanned calf strap, with proper maintenance, will last approximately 3–5 years of daily wear. Durability depends on environmental factors (sun exposure, humidity, temperature extremes), frequency of use, and care protocol. A strap will develop natural patina over time; this is aesthetic ageing, not deterioration. If the strap shows structural cracks, fibre thinning, or loss of lug shape, replacement is warranted. Periodic conditioning treatments extend service life.