Strap for Speedmaster First Omega in Space Master Chronometer Stainless Steel / Blue-Grey

The lug width is 19mm. This width is specific to this model and represents an uncommon dimension in contemporary watchmaking catalogs. To verify compatibility, measure the internal distance between the lug edges with a millimeter ruler, excluding any decorative protrusions.

The choice depends on your use case. Alligator is ideal for formal occasions and ages with dignity. Vegetable-tanned calf offers daily robustness. NATO nylon echoes the model's space and military heritage. FKM rubber guarantees absolute water resistance for aquatic activities. Chromatically, black, dark brown, and slate blue are the most harmonious choices with the stainless steel case.

The strap is changed via the spring bar that protrudes from the sides of the case. Using a dedicated tool (available from watchmakers or in kits) or a small flat screwdriver, gently press the spring to slide it inside the lug, freeing the strap end. Repeat from the opposite side. Installing the new strap is the reverse process: slide the spring inside the lug and ensure both ends are correctly positioned.

All straps with a 19mm lug width are compatible with the 310.32.40.50.06.002. On milanostraps.it you will find a complete selection of 19mm straps in various materials (alligator, calf, shell cordovan, NATO, rubber) ready to ship, customizable in length and thread color. For a bespoke experience, the Casati Milano atelier creates handcrafted straps with direct consultation.

A premium leather strap (alligator, calf, shell cordovan) has an average lifespan of 3-4 years in daily use, with variables due to sun exposure, humidity, and frequency of use. Vegetable-tanned leather tends to age visually within this timeframe, creating a characteristic patina. NATO nylon straps have superior durability (5-7 years) thanks to the inherent resistance of the fabric. Periodic maintenance (gentle cleaning, conditioning) significantly extends the strap's life. Casati Milano atelier offers an 18-month warranty on all handcrafted straps produced to measure.