Oris
Chronoris 01 673 7739 4034-Set RS— lug 20mm
Oris Chronoris 01 673 7739 4034-Set RS: 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
Oris 01 673 7739 4034-Set RSThe essential strap measurement.
Browse 20mm straps →01 673 7739 4034-Set RS
Oris caliber Oris 673 Hours, Minutes | Date | Chronograph
The Heritage
Compatible Straps
Selected for the 20mm lug width of the Chronoris
FAQ
What is the lug width of the Oris Chronoris 01 673 7739 4034-Set RS?
The lug width of the Chronoris 01 673 7739 4034-Set RS is precisely 20mm. This dimension was selected to maintain visual balance with the 40mm case diameter. To verify correct measurement, use a digital calliper positioned between the inner lug shoulders: the distance should read 20.00mm ±0.5mm.
Which strap is recommended for the Chronoris 01 673 7739 4034-Set RS?
Four primary strap materials are recommended for this Swiss chronograph: vegetable-tanned alligator for formal occasions (Hornback grain creates striking contrast with the brushed case), vegetable-tanned calf for those seeking evolving patina over time, NATO canvas for practicality and versatility (instant swap without tools), vulcanised rubber for humid environments and aquatic sports. Selection depends on usage context and personal aesthetic preference.
How do you change the strap on the Chronoris 01 673 7739 4034-Set RS?
Strap replacement requires a spring bar tool—a small bevelled steel lever—to compress the spring-loaded pins securing the strap to the lugs. Position the flat end of the tool into the pin groove, apply controlled pressure to flex the spring, extract the old strap and insert the new one by aligning the lug holes. This operation requires no specialised labour if executed with care.
Is the Chronoris 01 673 7739 4034-Set RS compatible with aftermarket straps?
Yes, the Chronoris is fully compatible with quality aftermarket straps provided they feature 20mm lugs. Numerous artisanal manufacturers create custom straps specifically sized for this measurement, offering extensive choice of materials (alligator, shell cordovan, calf, exotic leathers) and colourways unavailable in OEM markets.
What is the average lifespan of a leather strap for the Chronoris?
A well-crafted vegetable-tanned leather strap with 20mm lugs has an average lifespan of 18–36 months under daily wear and moderate moisture exposure. Vegetable-tanned alligator tends to last slightly longer (24–48 months) owing to the fibre structure of the skin. Durability depends on exposure to perspiration, rain and thermal variations: a strap rotated among two or three watches has a considerably longer service life.