Hamilton
Broadway H43516131— lug 20mm
Hamilton Broadway H43516131: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Hamilton H43516131The essential strap measurement.
Browse 20mm straps →H43516131
Hamilton caliber H-21 [Day - Date] Hours, Minutes, Small Seconds | Date, Day | Chronograph
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Broadway
FAQ
What is the exact lug width of the Hamilton Broadway H43516131?
The lug width of the Hamilton Broadway H43516131 is 20 mm. This measurement represents the distance between the two suspension pins (lug-to-lug distance) and determines the width of the compatible strap. You can verify this measurement manually using a digital calliper, measuring the space between the two attachment holes where the strap connects to the case.
Which strap is most suitable for the Hamilton Broadway H43516131?
For the Broadway H43516131, straps in Spanish alligator, vegetable-tanned calf leather, or technical NATO fabric are recommended. Black or anthracite alligator provides formal elegance, cognac or brown calf creates warm dialogue with the stainless steel case, whilst grey-green or navy NATO is ideal for sports usage. For chronographs intended for intense water conditions, vulcanised rubber in black is the most appropriate choice.
How do you change the strap on a watch with 20mm lugs?
Strap replacement requires a specific tool: the spring bar tool. Position the flat end of the tool under the suspension pin to compress the internal spring slightly, lift the old strap, completely remove the pin, align the new strap with the hole, reinvert the pin whilst compressing the spring again. The operation must be executed with precision to avoid scratching the case.
Are aftermarket straps compatible with the Hamilton Broadway H43516131 of equivalent quality to the original?
Yes, provided they are purchased from specialist suppliers such as Milano Straps. Handcrafted leather straps (alligator, calf, cordovan) are manufactured by certified European tanneries and offer durability and patina superior to factory straps. Compatibility is guaranteed by the universal 20 mm lug width: the strap attaches to the pins without structural modifications. Quality depends on the choice of materials, not the watch brand.
How long does a leather strap last on the Hamilton Broadway H43516131?
A well-maintained leather strap (alligator or calf) lasts on average 3–5 years of daily wear, up to 7–8 years if worn occasionally. Longevity depends on exposure to perspiration, water, UV rays and frequency of wear. Vegetable-tanned leather develops an ageing patina that, whilst aesthetic, does not compromise functionality. Vulcanised rubber straps last 4–6 years, whilst heavy cotton or synthetic fibre NATO straps can last indefinitely if washed regularly.