Strap for Big Crown ProPilot Big Day Date TLP

The Oris ProPilot 01 752 7760 4287-Set features a 22mm lug width. This is the historical standard for aviation tool watches and makes the model compatible with most aftermarket straps, including calfskin, alligator, NATO, and FKM rubber options.

The choice depends on style and intended use. For formal elegance: vegetable-tanned brown calfskin or satin-finished black alligator. For vintage authenticity: grey or military green NATO canvas. For marine or summer resistance: FKM elastomer in grey or black. All materials pair magnificently with the 45mm case and natural white dial of this model.

Strap replacement is straightforward: use a spring bar tool to press the spring latch laterally from underneath, on both lugs. Remove the old strap. Align the new strap with the lug holes and press the spring bar into position until it clicks. If uncertain, Casati Milano offers professional strap installation at their appointment-only atelier in Milan.

Absolutely. The 22mm lug width is compatible with any aftermarket strap manufactured to this specification. Milano Straps produces handcrafted straps in Italy for 22mm lugs, in vegetable-tanned leather, shell cordovan, NATO canvas, and FKM rubber—all tested for durability and detail finishing on aviation instruments like your ProPilot.

A quality calfskin or alligator strap—European leather, vegetable-tanned—typically lasts 3-5 years with daily wear and basic maintenance: dry cleaning with a soft cloth, avoiding prolonged exposure to uncleaned salty perspiration. Natural ageing develops patina and character. NATO canvas straps endure 5-8 years; FKM rubber 8-10 years. Durability increases significantly with hand-stitched construction and artisanal finishing, as found in Milano Straps' Concia Vegetale Suprema collection.