Strap for AquisPro 4000M Titanium / Blue / Rubber

The Oris Aquis 01 400 7777 7155-Set features a 26mm lug width. This dimension is specific to the 49.50mm case and represents the optimal ergonomic compromise between such a large case and comfortable wrist wear, particularly when wearing diving gloves. When purchasing a strap, ensure the attachment points (lugs) are precisely calibrated at 26mm between the centres of the tubing.

For authentic underwater use, a NATO strap in ballistic nylon or vulcanised rubber is the superior technical choice: it absorbs minimal water, dries rapidly, and requires minimal maintenance. If you prefer elegance and everyday wearability, a robust calf leather strap from vegetable tanning or vegetable-tanned alligator offers spontaneous ageing characteristics. A cognac alligator strap creates harmonious contrast with the titanium case and the typical dark blue dial of the Aquis series.

The Aquis 01 400 7777 7155-Set uses simple spring bar lugs. Obtain a spring bar tool: insert the thin flat end beneath the lower lug's tubing at the case, apply gentle inward pressure to compress the spring bar, and slide the strap out of the attachment. Repeat for the upper lug. When installing the new strap, align the passants with the lugs and press firmly until you feel the spring catch. Verify the strap is fully seated before wearing the watch.

Absolutely. Any strap with 26mm spring bars is geometrically compatible. However, to preserve underwater performance characteristics, choose materials and constructions designed for moisture resistance: vegetable-tanned leather treated with natural waxes, synthetic NATO, or vulcanised rubber. Avoid thin leathers or solvent-based finishes that deteriorate with prolonged salt water contact. Milano Straps curates a selection of artisanal 26mm straps specifically chosen for this category of watches.

Longevity depends on tanning method and usage patterns. A vegetable-tanned calf strap, worn daily moderately (4–5 days weekly) and dried promptly after immersion, maintains structural integrity for 3–5 years. Alligator, owing to superior fibre density, extends this period to 5–7 years. If constantly exposed to salt water without post-dive drying, any leather experiences accelerated degradation. Milano Straps artisanal straps utilise premium leathers that age consciously, forming patina that honours the passage of time rather than dissolution—a hallmark of true sartorial craftsmanship.