Strap for Aquis Date 39.5 Stainless Steel / Blue / Rubber

The lug width (distance between the lugs) of the Oris Aquis 01 733 7732 4135-07 4 21 64FC is 20mm. This measurement determines compatibility with all aftermarket straps. Always verify this dimension using a digital calliper by inserting the tip between the lugs on the inner side of the case before ordering a replacement strap.

There is no single 'best' option, but rather choices tailored to use-case: for diving and water sports, a vulcanised FKM rubber strap provides superior grip when wet and resistance to salt water and chlorine. For smart-casual wear, vegetable-tanned calf leather develops a natural patina over time. Genuine alligator offers elegance without compromising the sporty DNA of the case. NATO straps represent the ideal balance between daily versatility and value.

Strap removal is accomplished by extracting the spring bars connecting the strap to the lugs. Using a dedicated spring bar tool, apply gentle pressure to retract the spring mechanism, allowing the pin to be withdrawn. Repeat on both sides. Align the new strap holes with the lugs and reinsert the spring bars until fully seated. Always verify secure attachment before wearing the watch.

All straps with a 20mm lug width are compatible with the ref. 01 733 7732 4135-07 4 21 64FC. This includes leather straps (calf, alligator, shell cordovan), NATO and textile options, FKM rubber sports straps, and 20mm metal bracelets. Milano Straps curates a selection of bespoke artisanal models certified for this measurement, verifying thickness and construction quality to ensure optimal fit and aesthetics.

Leather strap longevity depends on usage pattern and tanning method: calf leather with vegetable tanning worn daily in dry conditions typically lasts 3-5 years before structural failure. Alligator and shell cordovan, being denser materials, can exceed 7 years of wear. Primary degradation factors are constant moisture exposure (especially chlorine in swimming pools), salty perspiration, and prolonged UV exposure. A rubber FKM sports strap offers indefinite lifespan if regularly cleaned.