Strap for Presence 34.5 Automatic Stainless Steel Silver

The lug width of the Longines Presence L4.721.4.78.2 is 18 millimetres. This measurement represents the effective space between the case lugs where the strap attaches. It is a precise and non-negotiable dimension: a strap of different width would result in poor aesthetic fit and potential mechanical instability.

For the Presence L4.721.4.78.2, straps in alligator with vegetable tanning (the most elegant solution), vegetable-tanned leather (versatile and durable), or vulcanised rubber (sporty approach) are recommended. The choice depends on intended use and season of wear. Alligator is ideal for those who appreciate natural leather ageing; calf leather for daily wear; rubber for a more contemporary effect.

The strap is changed using a spring bar removal tool. Position the spring bar horizontally relative to the lug, push the small plunger inward to release the spring end, then extract the spring bar. Repeat for the other side. Insert the new strap by aligning the holes with the lugs and pressing the spring bars until they click into place.

Yes, you can use aftermarket compatible straps provided they have an 18-millimetre lug width. It is advisable to opt for quality artisanal straps made from natural materials such as alligator, calf leather or shell cordovan to maintain the watch's elegance and aesthetic coherence. Avoid straps of incorrect width to preserve structural integrity.

A quality, artisanal leather strap has an average lifespan of 3-5 years with daily wear, varying depending on the material and care taken. Vegetable-tanned alligator ages beautifully but requires periodic cleaning and protection from rain. Calf leather is more durable and resistant to daily wear. Longevity increases significantly if the strap is protected with specific creams and not constantly exposed to moisture and perspiration.