Sinn
Instrument Chronographs 356.072— lug 20mm
Sinn Instrument Chronographs 356.072: 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
Sinn 356.072The essential strap measurement.
Browse 20mm straps →356.072
Sellita caliber SW500-1 Hours, Minutes, Small Seconds | Date, Day | Chronograph
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Instrument Chronographs
FAQ
What is the precise lug width of the Sinn Instrument Chronographs 356.072?
The lug width is 20 mm. This dimension is specific to the 38.50 mm case and is determined by the geometry of the lugs. A 20 mm strap fits perfectly without lateral play, ensuring proper wear on the wrist and maintaining visual harmony between case and strap. Always verify compatibility by measuring the internal distance between the spring bars.
Which type of strap is best suited to the Sinn 356.072?
This depends on intended use. For professional or semi-formal contexts, a quality alligator or shell cordovan offers understated elegance and durability. For daily intensive wear, robust calf leather with vegetable tanning develops a natural patina over time. If the chronograph is destined for sports activities or humid environments, a sturdy nylon NATO or vulcanised rubber maintains functional character without compromise.
How do I change the strap on the Sinn 356.072?
The Sinn 356.072 features open lugs (not quick-release) on both sides. Use a spring bar removal tool: position the forked end beneath the spring, apply controlled pressure to compress the spring inward, then slide the old strap out of the lug. Repeat on the opposite side. For installation, slide the new strap under the pins, verifying that the spring bar returns to its natural position. Always use gentle motions to avoid damaging the spring.
Can I fit an aftermarket strap compatible with the Sinn 356.072?
Yes, provided the strap is specifically manufactured for a 20 mm lug width. Bespoke leather, rubber or fabric straps engineered to correct tolerances fit perfectly. We recommend checking the manufacturer's technical specifications before purchase. Atelier Casati Milano produces custom straps for this chronograph, guaranteeing build quality consistent with the instrument.
What is the average lifespan of a natural leather strap on a chronograph like the Sinn 356.072?
This depends on intensity of use and tanning method. Premium vegetable-tanned calf, worn daily, maintains structural integrity for 4–6 years; shell cordovan can last 8–10 years due to the material's natural density. Alligator, under normal conditions, typically lasts 5–7 years. Wear is primarily aesthetic (patina development) rather than functional. Protecting the strap from prolonged moisture and excessive heat significantly extends longevity.