Strap for Constellation Co-Axial 31 Double Eagle Stainless Steel / MOP

The lug width of the 1590.70.00 is strictly 20mm. This dimension is dictated by the case architecture of the Constellation from this generation and is not interchangeable with 18mm or 22mm lugs. To verify, measure the distance between the two lug pins: it must be exactly 20mm.

Alligator leather with vegetable tanning represents the traditional choice: the small-scale texture returns a refinement that the case steels accentuate. Notable alternatives are vegetable-tanned calf leather (quick patina development) and shell cordovan in burgundy or black for a more contemporary approach.

The 1590.70.00 features an integrated bracelet. Removing the original bracelet requires watchmaking expertise: the lugs are not user-removable. Contact a certified watchmaker or specialized atelier for replacement, which often requires specific tools to preserve the case.

Yes, there are aftermarket straps in 20mm specifically compatible with the 1590.70.00. Online you will find ready-to-ship options customizable in sizes, initials, and stitching thread. Casati Milano atelier also creates bespoke straps made-to-measure with personal leather selection and 18-month warranty.

A quality leather strap (alligator, calf, shell cordovan) with vegetable tanning lasts an average of 3-5 years with daily wear. Durability depends on frequency of use, exposure to moisture, and care: avoid prolonged water contact and apply protective balms annually. Casati Milano straps include an 18-month warranty and are regenerable.