Strap for Avigation Watch Type A-7 1935 41 / Black

The lug width of the Longines Heritage L2.812.4.53.2 is 20mm. This measurement corresponds to the distance between the two horizontal attachment pins located in the case lug area. It is essential to verify this dimension before purchasing an aftermarket strap, as compatibility depends on precise measurement.

For this 41mm chronograph, straps in black alligator, shell cordovan, or vegetable-tanned calf leather are recommended. Alligator offers absolute formal elegance, shell cordovan ensures a noble patina over time, whilst calf provides immediate comfort and versatility. The choice depends on intended use and personal aesthetic preferences.

Strap replacement is accomplished by extracting the attachment pins with a dedicated tool (spring bar removal tool). Position the watch on a stable surface, locate the two horizontal pins beneath the case, then apply gentle pressure from inside outward. The old strap slides away, allowing insertion of the new one. Care is recommended to avoid scratching the case.

Yes, provided the strap is manufactured for the 20mm lug width. However, not all 20mm straps possess identical construction quality or longevity. Artisanal Milanese straps are crafted from premium leathers and double-stitched, guaranteeing superior durability and comfort compared to standard industrial products.

Leather strap longevity depends on usage intensity, material type, and maintenance. An artisanal strap in alligator or shell cordovan, with regular care (periodic cleaning and protection from extreme humidity), may last 3–5 years of daily wear. Vegetable-tanned calf, being less dense, typically shows wear signs after 2–3 years. The 18-month warranty on artisanal straps covers manufacturing defects.