Strap for Speedmaster Professional Moonwatch Alaska Project II

The lug width of the ST 145.0022 Alaska II is exactly 20 millimeters. This parameter corresponds to the historical standard of the original Speedmaster Professional and differs from the 19 mm of later references. It is essential to measure the springbar width precisely before ordering an aftermarket strap.

For a vintage chronograph from the 1970s, dark alligator (slate grey or deep brown) represents the optimal choice: it combines minimalist elegance with sporty robustness. Alternatively, vegetable-tanned calf develops magnificently, acquiring patina within 12-18 months, while grey-blue Cordura NATO offers versatility and the ease of change typical of professional instruments.

Changing the strap on the ST 145.0022 is done via the lateral springbar: press the bar button to retract the end, remove the old strap, align the holes of the new lug to the bar seats, and release. The procedure takes approximately 2 minutes and a simple springbar tool. Casati Milano atelier provides free assistance with the first strap change.

Yes, absolutely. The ST 145.0022 is compatible with all straps in 20 mm lug width, both leather and fabric. It is crucial to verify the exact springbar width (20 mm) to avoid misalignment with the case lugs. milanostraps.it offers 20 mm straps ready for shipment and customizable.

A high-quality alligator or calf strap, worn daily, lasts 3-5 years before showing visible wear (cracking, peeling). With sporadic maintenance (cleaning, annual conditioning) the lifespan extends to 6-8 years. Vegetable-tanned leather develops attractive patina during this process, increasing the vintage character of the watch. Milano Straps offers an 18-month warranty on bespoke straps.