Strap for Master Ultra Thin Réserve de Marche Pink Gold / Eggshell / Alligator

The Jaeger-LeCoultre Master Ultra Thin Q1372510 features a lug width of 21mm. This measurement is determined by the width of the 39mm case and represents the distance between the two spring bar pins. To verify, place a ruler perpendicular to the lugs and measure the distance between the pins.

For the Master Ultra Thin Q1372510 in rose gold, we recommend straps in brown or cognac alligator, or vegetable-tanned leather in burgundy or grey. Alligator is the most refined choice to enhance the jewellery-like nature of the watch, whilst vegetable-tanned leather offers softness and natural patina development. Avoid straps that are too thick, as these would compromise the delicate case proportions.

To change the strap, you'll need a spring bar tool. Position the watch with the lugs facing upward, insert the tool blade into the small groove of the spring bar, press gently downward to release tension, and withdraw the pin from the lug. Repeat on the opposite side, then insert the pins of the new strap into the holes and release the springs. If you prefer professional assistance, Casati Milano offers expert strap replacement on appointment.

Yes, any strap with a 21mm lug width is compatible with the Q1372510. Ensure the strap is the correct width (21mm measured between the pins) and that the material thickness is proportionate to the delicate lugs. On milanostraps.it you'll find a curated selection of artisanal 21mm straps specifically compatible with your model.

A quality leather strap, such as alligator or vegetable-tanned calf, typically lasts 3–5 years with regular daily use. Longevity depends on frequency of wear, moisture exposure, and maintenance. Casati Milano straps include an 18-month guarantee on manufacturing defects and can be restored or replaced with expedited service on appointment.