Strap for BC4 Chronograph DLC / Black

The lug width of the Oris BC4 01 674 7633 4794-07 5 24 58BFC is 24mm. This dimension ensures correct visual proportions on a 45mm case and allows for the use of quality artisanal straps without any modification. Always verify the precise distance between the lugs before purchasing a replacement strap.

The ideal strap depends on intended use. For authentic vintage aesthetics, we recommend vegetable-tanned leather at 4-4.5mm thickness, which develops natural patina over time. For instrumental practicality, a NATO strap in ballistic canvas or FKM fluoroelastomer offers durability and minimal maintenance. For technical elegance, alligator or coarse-grained calf leather creates fascinating visual contrast.

Changing the BC4 strap requires two minor tools: a thin spring bar tool and possibly a magnifying lens. Position the watch on a soft surface, locate the horizontal lugs at the case ends, insert the spring bar tool tip into the designated side grooves, press gently and extract the spring pin. Repeat on the opposite side. Mount the new strap by inserting the lugs into the slots and compressing the spring pins until you hear the security click.

Yes, Milano Straps offers a complete collection of artisanal 24mm straps compatible with the BC4: natural leather in vegetable tanning, ballistic canvas NATO straps, alligator and calf leather straps, and technical materials. All straps are customisable and ready for dispatch. Compatibility is guaranteed by the standard 24mm lug width.

A quality leather strap (vegetable-tanned or alligator) offers an average lifespan of 3-5 years with daily use and periodic maintenance. Longevity depends on environmental humidity, washing frequency and direct sun exposure. Vegetable-tanned leather develops visible patina, whilst alligator maintains structured texture longer. FKM (rubber) straps last 5-7 years with less aesthetic wear.