Strap for Engineer II Chronometer Red Label

The Ball Watch Engineer II NM2026C-SCJ-GY features a lug width of 20 millimetres. This dimension is the standard for the Engineer II family and allows compatibility with straps designed for a wide spectrum of historical models. To verify strap compatibility, measure the distance between the two metal pins that run through the lateral lugs of the case: it must be exactly 20mm.

We recommend thick leather straps (minimum 1.4mm) such as alligator or vegetable-tanned calf, which impart robust elegance. For sporting contexts, NATO fabric straps are ideal for sandy or marine environments. Rubber represents the technical choice par excellence, absorbing vibrations and resisting chemical agents. Colour pairings: dark brown or black for formal settings, graphite grey or navy for sporting contexts.

To change the strap, use a spring bar tool (small metal lever specific to this task). Insert the curved tip of the tool into the small hole of the lateral lug on the case, apply light outward pressure to release the pin, then remove the worn strap. Verify that the new strap has the correct passage holes for the 20mm pin, then insert the pin into the holes of the new strap and ensure it is firmly secured on both sides of the case.

All straps manufactured for the 20-millimetre lug width are compatible with the NM2026C-SCJ-GY. Milano Straps offers a curated collection of artisanal straps in alligator, calf, shell cordovan, NATO and rubber, specifically designed and tested for 40mm watches such as the Engineer II. Each strap respects the structural thickness required to contain the weight of the case without failure.

A quality leather strap (alligator, calf, shell cordovan) on the NM2026C-SCJ-GY has an average lifespan of 3–5 years in daily use, depending on exposure to humidity, temperature and intensity of use. Vegetable tanning tends to age better, developing a patina that characterises the strap over time. Prolonged exposure to UV rays and saltwater accelerates wear. A well-maintained strap, dried after water contact and stored in temperate environments, can last 6–7 years.