Strap for 1966 40 Stainless Steel Blue Alligator Strap

The lug width of the Girard-Perregaux 1966 49555-11-431-BB60 is 20 millimetres. This measurement is strictly compatible with the curved lugs of the case, ensuring perfect aesthetic alignment and proper pressure distribution during strap replacement. The measurement is taken by placing a calliper or ruler between the metal shoulders of both lugs, perpendicular to the case body.

For the 49555-11-431-BB60, ideal straps include: brown alligator with fine grain to preserve classicism, burgundy shell cordovan for developing patina over time, or stonewashed cotton NATO for daily versatility. Those preferring rubber can opt for FKM in anthracite with a deployante buckle. The choice depends on the desired balance between formal elegance and practical wear.

Strap replacement requires the use of a spring bar tool. Position the tool in the slot at the base of each lug, apply light upward pressure to disengage the spring bar, then remove the old strap. Insert the new 20mm strap into the lugs and allow the spring bar to snap into place. Verify that the spring bar is fully locked before wearing the watch.

Yes, any 20mm strap is compatible with the Girard-Perregaux 1966 49555-11-431-BB60. Milano Straps offers artisanal straps in leather (alligator, calf, shell cordovan), NATO, and FKM rubber, all crafted with precision to ensure perfect fit on the curved lugs. Before purchasing, always verify that the lug width is exactly 20 millimetres.

A quality leather strap, made from vegetable-tanned leather or shell cordovan, typically lasts 3-5 years with regular wear (5-6 days per week). Longevity depends on exposure to moisture, heat, and repetitive movement. Leather tends to weaken at the buckle and keeper areas due to constant pressure. Light maintenance—periodic cleaning and conditioning with specific creams—extends lifespan significantly.