H. Moser & Cie
Henry 5901-0200— lug 20mm

The lug width of the H. Moser & Cie Henry 5901-0200 is 20 mm. This measurement represents the distance between the two lugs of the case, where the strap attaches. It is measured internally, from lug to lug, using a calliper or metal ruler positioned perpendicular to the case axis. This precision is essential for selecting compatible straps in the aftermarket.

The ideal strap depends on your primary usage. For formal occasions, alligator in dark brown or black creates aesthetic continuity with white gold, developing a golden patina over time. For daily wear, vegetable-tanned calf in cognac tone or structured blue navy leather maintains elegance whilst introducing character. A black NATO creates deliberate contrast, perfect for those seeking a contemporary attitude. During summer months, black or charcoal grey FKM rubber offers freshness and practicality. Your choice of material becomes an extension of your personal aesthetic statement.

Changing the strap on the 5901-0200 requires care, as the model features an integrated bracelet rather than traditional lugs. We recommend consulting a specialist watchmaker in luxury timepieces: the Henry's constructive configuration demands technical precision. Essential tools are: a spring bar tool, well-lit workspace, and soft surface to protect the case. Gently remove the spring from the existing lugs, position the new 20 mm strap, and reinsert the spring with controlled pressure. Excessive pressure risks damaging the white gold; insufficient pressure risks strap detachment.

Yes, all straps with 20 mm lug width are compatible with the 5901-0200. Milano Straps offers a dedicated collection of 20 mm straps in high-grade leather (alligator, calf, shell cordovan), striped NATO, and technical FKM rubber. Compatibility is guaranteed by lug width standardisation: any strap marked '20 mm' will attach correctly to your case lugs. We recommend verifying strap thickness (typically 3–4 mm for formal watches, up to 5 mm for sports models) to avoid excessive tension on the spring bars.

Leather strap durability depends on material, frequency of use, and care. A quality alligator strap, worn daily, lasts 3–5 years before replacement is needed. Vegetable-tanned calf, exposed to regular perspiration and humidity, lasts 2–3 years. Shell cordovan, owing to its structural density, reaches 5–7 years. Factors reducing durability include: prolonged water contact, direct exposure to salty perspiration, lack of drying and aeration post-wear. NATO and FKM rubber straps, conversely, last 8–10+ years due to synthetic material resistance. Milano Straps offers restoration services and buckle replacement to extend the operational life of premium straps.