Strap for Star Classique Automatic Two Tone

The Montblanc Star 107309 features a lug width of 19mm. This measurement is specifically engineered for the red gold and stainless steel case lugs. It is essential to verify this dimension before purchasing an aftermarket strap, as 19mm is not a universal standard and improperly fitted straps risk stressing the lug structure.

For the 107309, we recommend black or brown alligator leather for maximum formal elegance, or vegetable-tanned calf leather for those who appreciate a patina that develops with time. These materials respect the bicolour composition of the red gold and steel case. NATO straps are advised for more versatile wear, while vulcanised rubber offers robustness whilst maintaining the dress-sport character.

Strap replacement involves removing the spring bars that connect the lugs to the previous strap. Using a dedicated tool (spring bar tool), compress the internal spring and extract it laterally. Next, thread the new strap through both lug ends, ensuring the spring bar is fully secured. We recommend performing this operation on a soft surface to prevent scratches.

Yes, provided the strap is dimensioned for 19mm lug width. Many artisanal straps do not cover this specific measurement. MilanoStraps offers a dedicated collection for 19mm lugs, where every strap has been tested for mechanical and aesthetic compatibility with the Montblanc Star. We advise against forcing or using undersized straps, as these may damage the red gold lugs.

Leather strap longevity depends on usage, care and tanning method. A vegetable-tanned alligator strap, if exposed to moderate humidity and properly maintained, can last 5-10 years or longer. Vegetable-tanned calf tends to age more quickly (3-7 years) but develops an appreciated patina. Exposure to humid or salt-laden environments (sea, excessive perspiration) significantly reduces durability. We recommend rotating periodically between different straps to extend the life of each.