Sinn
Instrument Chronographs 356.020— lug 20mm
Sinn Instrument Chronographs 356.020: 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 356.020The essential strap measurement.
Browse 20mm straps →356.020
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 lug width of the Sinn Instrument Chronographs 356.020?
The Sinn 356.020 features a 20 mm lug width, measured as the internal distance between the two attachment points from lug to lug. This is a fixed construction specification ensuring compatibility with all aftermarket straps of equivalent dimension, following the tradition of classic chronographs from the 1970s.
What is the best strap for the Sinn 356.020?
The choice depends on intended use. For civil and professional contexts, cognac-coloured alligator or vegetable-tanned brown calf leather maintains instrumental elegance. For military or outdoor environments, a satin NATO strap or vulcanised rubber reasserts technical vocation. Shell cordovan represents the definitive choice for those seeking durability and patina development over time.
How is the strap replaced on the Sinn 356.020?
The 356.020 strap is replaced by unscrewing the lugs, a straightforward operation performed with a specialised tool or by a qualified jeweller. The 20 mm lugs are universally compatible with any strap of identical dimension, requiring no mechanical adaptations. Ensure attachment points are perfectly aligned before final tightening.
Which aftermarket straps are compatible with the Sinn 356.020?
All straps fitted with 20 mm lugs are fully compatible with the 356.020. Milano Straps offers a curated selection of leather, textile and rubber straps specifically calibrated for 38–40 mm chronographs. Compatibility is guaranteed by standardised lug dimensions, requiring no constructive modifications.
What is the lifespan of a leather strap on the Sinn 356.020?
A superior vegetable-tanned calf strap maintains structural integrity for 3–5 years of daily wear, developing desirable natural patina. Shell cordovan extends lifespan to 7–10 years. Alligator reaches 4–6 years. Durability depends on frequency of use, moisture exposure and routine care. Replacement is recommended when fibres exhibit obvious desiccation.