Montblanc
Star 107076— lug 19mm

The Montblanc Star 107076 is fitted with lugs (lug width) measuring 19 millimetres. This dimension is specific to this model and is not a commercial standard. To verify it, measure the internal distance between the two attachment points of the case using a digital calliper: the result must be exactly 19mm to ensure compatibility with aftermarket straps.

Alligator represents the most aesthetically natural choice, as its regular texture and squared grain create visual harmony with the rigorous geometry of the case. However, traditional calf leather and shell cordovan are excellent alternatives: the former offers versatility and softness over time, whilst the latter imparts natural lustre and chromatic depth that evolves with wear.

Strap replacement is accomplished using spring bars (spring-loaded rods) that connect the strap to the case lugs. Use a dedicated spring bar tool: insert the small hook under a spring bar from one side, push inward to release the rod, remove the old strap and insert the new one by securing one end first, then gently compressing to position the second end. The operation requires care to avoid damaging the case.

Yes, provided the strap is designed specifically for 19-millimetre lugs. Compatibility depends exclusively on lug width, not on the watch brand. Ensure that the aftermarket strap has been constructed to this exact dimension and, preferably, has undergone rigorous quality control.

The lifespan of a leather strap varies considerably depending on material quality, frequency of wear and environmental conditions. A high-quality alligator or shell cordovan strap, vegetable-tanned, typically lasts 5 to 10 years of regular use. Chrome-tanned calf leather has a slightly shorter lifespan, approximately 3–7 years. Frequent exposure to water, humidity and perspiration accelerates ageing; conversely, periodic rotation between multiple straps significantly extends the longevity of each.