Strap for Senator Chronometer Rose Gold / Silver / Alligator / Folding

The lug width is 21 mm. This measurement represents the internal distance between the two spring bar attachments on which the strap sits. To verify it correctly, measure from the centre of one attachment to the centre of the other, avoiding measurement of the external diameter of the case at the lug zone. The 21 mm is an intermediate standard ideal for proportional balance on 42 mm cases.

For a rose gold timepiece of this category we recommend straps in shell cordovan or calf leather with vegetable tanning in cognac or dark brown shades. Shell cordovan develops a natural patina that dialogues magnificently with the rose gold patina over time. Alternatively, a NATO strap in heavy-weight canvas in anthracite grey creates interesting material contrast between canvas texture and metal smoothness.

To change the strap, you must remove the spring bars (also called spring pins) that connect the strap to the case lugs. Position a flat tool (such as a dedicated tool or small rounded blade) beneath the spring itself, exerting gentle pressure to make it retract. The pin then releases and the strap can be extracted. When inserting the new 21 mm strap, ensure the pin is perfectly positioned before releasing it. If you are inexperienced, we recommend contacting a specialised service centre.

Yes, many manufacturers specialising in artisanal straps offer models compatible with 21 mm lug width. Always verify the measurement is exactly 21 mm and that leather thickness is suitable for your watch (typically 2.5–3 mm for leather straps). Choose manufacturers that guarantee construction quality consistent with the value of the timepiece itself.

The lifespan of a leather strap depends on tanning method, environmental wear and wearing habits. A shell cordovan strap with vegetable tanning can last 3–5 years of daily use before showing significant signs of wear. Vegetable-tanned calf has a slightly shorter lifespan, around 2–4 years. Lower-quality leather straps deteriorate more rapidly. Keeping the strap dry, protecting it from prolonged moisture and alternating multiple straps significantly extends longevity.