Strap for Spirit Chronograph 42 Silver / Bracelet

The lug width of the Longines Spirit L3.820.4.73.6 is 22mm. This measurement represents the distance between the two lugs (lateral attachment points) on the case. To verify this accurately, use a digital calliper positioned perpendicular to the case plane, measuring the distance between the inner contact points of the lugs.

For this reference, we recommend an alligator or vegetable-tanned leather strap for a formal setting, or a premium NATO strap if you prefer a technical-sporting style consistent with its aviatory heritage. A cordovan or black shell cordovan strap creates a fascinating aesthetic contrast with the brushed stainless steel case. The choice depends on the context of use: office, travel, or water sports.

The change is straightforward and requires no specialised tools. Flip the watch over and locate the lateral lugs. Use a thin tool (spring bar tool) to depress the internal elastic pin of each lug, sliding the old strap slightly outward. Once the lugs are free, insert the new strap by aligning the shoulders with the lugs and ensuring the elastic pin returns to its original position.

Yes, any quality artisanal strap with a 22mm lug width is fully compatible. Personalised aftermarket straps often offer superior aesthetics and comfort compared to OEM straps, thanks to carefully selected materials and craftsmanship. Ensure the strap is fitted with adequate stainless steel lugs and that the connections are well-finished to prevent micro-scratches on the case.

A high-quality leather strap with vegetable tanning and artisanal construction has an average lifespan of 3-4 years with regular maintenance and daily wear. Durability depends on factors such as humidity, sun exposure, frequency of wear and care. Leathers such as shell cordovan or Chromexcel age particularly well, developing a precious patina. To extend the life, we recommend avoiding frequent wetting of the strap and allowing it to dry naturally in case of rain.