Strap for Seamaster PloProf Co-Axial Master Chronometer Grey / Orange

The lug width of the PloProf 227.90.55.21.99.002 is exactly 24 millimeters, measured between the inner shoulders of the lugs. This dimension is proportionate to the 55mm case diameter and allows pairing with any standard 24mm aftermarket strap on the market.

There is no absolute choice, but three top options: black alligator for sophisticated elegance, FKM rubber for technical supremacy in water, vegetable-tanned calf for versatile daily use. The choice depends on your primary use context: city, professional diving, or mixed wear.

The PloProf lugs are fitted with spring bar pins. Use a dedicated tool (spring bar tool) to compress the pin on one side, extract it from the case, then slide off the old strap. Insert the new strap, reinsert the pin, and verify that the pin is positioned symmetrically. This is a simple operation, though we recommend having it done by a watchmaker the first time.

Yes, hundreds. Any strap with a 24mm lug width is compatible. We recommend fine-grained leather (alligator, calf, crocodile) or technical straps (NATO, FKM rubber) to balance the weight and dimensions of the 55mm case. Always verify that the strap has proportionate lugs (approximately 4-5mm thick).

A leather strap (alligator, calf, crocodile) typically lasts 3-5 years with regular use and careful maintenance (monthly cleaning with a damp cloth, semi-annual conditioning). On the PloProf, which is subject to exposure to chlorine, salt water, and UV rays, durability tends toward the lower end (2-4 years). Rubber and NATO straps easily exceed 5 years without visible degradation.