Strap for Osmior Tourbillon Automatic Regulator Silver

The Leroy Osmior Range LL104/1 features a 20mm lug width. This dimension is measured internally between the spring bar attachment points on the white gold case. Precision is paramount: any deviation would compromise either the mechanical stability of the strap or aesthetic harmony relative to the case proportions.

The ideal strap depends on usage context and aesthetic preference. Dark brown or black alligator ensures classical elegance, amplifying the precious quality of white gold. Vegetable-tanned calf leather offers chromatic evolution over time. A grey or beige NATO introduces sporty modernity. Textured FKM rubber represents the most contemporary choice for intensive daily wear.

The LL104/1 uses standard 20mm straight spring bar attachment. To change the strap, remove the spring bars using a dedicated tool (spring bar tool) or consult a qualified watchmaker. Extract the bars from the lower case position, slide away the old strap, and insert the new one. Ensure the bars are correctly seated and the strap adheres symmetrically.

Yes, the Leroy LL104/1 is fully compatible with premium aftermarket straps, provided they respect the 20mm lug width specification. Milano Straps offers a curated selection of alligator, vegetable-tanned calf, shell cordovan, NATO, and FKM rubber straps, all tested for aesthetic harmony and mechanical compatibility with this case.

A quality leather strap (alligator, calf, shell cordovan) worn daily maintains structural integrity for 2-3 years. The attachment point near the lug (at the dial side) is the first natural point of wear. Vegetable-tanned leather ages nobly, developing rich patina; chrome-tanned leather offers superior durability but less aesthetic evolution. Synthetic NATO and FKM rubber straps exceed 5 years of intensive use.