Strap for Speedmaster Professional Missions Skylab 1

The lug width of the 3597.21.00 is 20mm. This measurement is invariable in the model and represents the distance between the horizontal pins that attach the strap to the case. To verify it, use a digital caliper by positioning the tip between the center of one pin and the center of the other.

The best strap depends on use. For collection pieces and formal elegance, we recommend vegetable-tanned alligator or shell cordovan. For daily practicality, calf leather hand-dyed with tone-on-tone stitching. For aquatic environments, vulcanized synthetic rubber maintains resistance. All must have 20mm lug width.

Remove the old strap using a spring bar tool to depressurize the horizontal pins and slide them out from the case lugs. Insert the pins of the new 20mm strap into the same lugs, verifying that they snap firmly into place. If inexperienced, consult a qualified watchmaker to avoid damage to the case.

Yes, provided the strap has 20mm lug width. However, we recommend choosing craftsmen specialized in watchmaking: construction quality, finishing, and stitching type make a difference over time. Brands such as Omega, Rolex, and others offer standards, but custom-made straps guarantee optimal comfort and aesthetic coherence with the importance of your Speedmaster.

Durability depends on the material and usage. A strap in alligator or shell cordovan with vegetable tanning resists 3-5 years with daily use and maintenance. Vegetable-tanned calf takes 2-3 years. Synthetic rubber, more resistant to wear, lasts 4-6 years. Exposure to sunlight, fresh and salt water, and perspiration accelerates aging. Periodic cleaning with a damp cloth significantly extends durability.