Strap for Promaster Air GMT

The Citizen ProMaster NB6045-51H features a lug width of 22 millimetres. This measurement represents the distance between the two attachment points on the case and is essential for ensuring compatibility with aftermarket straps. When purchasing a replacement strap, it is crucial to verify that the declared dimension matches exactly 22 millimetres to avoid fitting issues or case oscillation.

The choice of strap depends on the intended use case. For professional and formal environments, an alligator leather strap with vegetable tanning offers elegance and durability. For sporting or underwater applications, a natural rubber or NATO fabric strap provides superior grip and moisture resistance. For everyday versatility, a calf leather strap with hammered texture represents the ideal compromise between aesthetics and practicality. A deployante clasp is strongly recommended to facilitate precision adjustments when the watch is worn over protective clothing.

Strap replacement is a straightforward procedure requiring no watchmaking expertise. Use a dedicated tool (spring bar tool) to gently push the elastic pins securing the strap to the case lugs. Once removed, the strap will slide off easily. Insert the new strap by aligning its holes with the lugs, then reinsert the elastic pins until they are fully locked. It is advisable to work on a soft, well-lit surface to prevent accidental loss of components.

Yes, the NB6045-51H is fully compatible with aftermarket straps measuring 22 millimetres. The standardisation of lug width permits the use of artisanal straps from specialist manufacturers in alligator, calf, shell cordovan or other premium materials. Numerous artisanal 22mm straps are available commercially and represent an excellent opportunity to personalise the watch according to individual aesthetic preferences.

The durability of a leather strap depends on the material, tanning process and intensity of use. A calf leather strap with vegetable tanning subjected to daily wear maintains structural integrity for 3-5 years, during which it develops a natural patina that enhances aesthetic character. Thicker leathers such as alligator or shell cordovan can last 7-10 years with routine maintenance (periodic cleaning, protection from prolonged moisture exposure). Exposure to direct UV rays and extreme humidity variations accelerates ageing. Periodic rotation between different straps significantly extends the overall longevity of each.