Oris · TT3

Strap for TT3 Chronograph Second Time Zone Titanium - Rose Gold / Black / Rubber

Takes 22 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width22 mm
Case diameter43 mm
Reference01 677 7590 7764-Set
FamilyTT3
MovementOris caliber Oris 677 Additional 24 Hour Hand (adjustable), Hours, Minutes, Small Seconds | Date | Chronograph
CaseTitanium, Stainless Steel

Spring bar

Swiss Standard universal spring bars

The right category for this model · 316L steel, all lug widths 13–26 mm

Straps for the TT3 01 677 7590 7764-Set

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The TT3 01 677 7590 7764-Set, seen from the bench

The Oris TT3 01 677 7590 7764-Set is a Swiss-engineered sports chronograph featuring a 42.50 mm titanium and stainless steel case with 22 mm lug width. It houses the proprietary Oris caliber 677 movement, based on the Sellita SW500, delivering 28,800 vibrations per hour and exceptional power reserve. The three-counter chronograph includes small seconds, 30-minute chronograph, and 12-hour registers, with date window at 3 o'clock and 100 meters water resistance.

Frequently asked questions

What is the correct lug width for the Oris TT3 01 677 7590 7764-Set?

The Oris TT3 reference 01 677 7590 7764-Set features a lug width of precisely 22 mm. This dimension is critical for both aesthetics and function: an undersized strap would create unsightly gaps at the lugs, whilst an oversized strap would not fit properly. Always measure the lug width with a rigid ruler positioned parallel to the dial, from the inside of one lug to the inside of the other.

Which strap material is most suitable for the Oris TT3 chronograph?

The choice depends on intended use: an alligator hide with vegetable tanning elevates sophistication without compromising technical character; vegetable-tanned calf develops a compelling patina over time; a NATO strap in ballistic nylon reaffirms the military heritage; a vulcanised elastomer ensures water resistance and practicality in demanding conditions. We recommend selecting based on the patina development you wish to experience.

How do I change the strap on the 01 677 7590 7764-Set?

Strap replacement requires extraction of the spring bars using a dedicated tool. Position the watch on a soft, secure surface; locate the access hole adjacent to each lug; insert the extraction tool beneath the spring and lift gently toward the dial until the spring compresses; remove the pin. Reverse the procedure to install a replacement strap with correct 22 mm lug width. If inexperienced, consult a certified watchmaker.

Are third-party aftermarket straps compatible with the Oris TT3 chronograph?

Yes, provided the strap measures exactly 22 mm in width and features quality spring bars. An artisanal strap from Milano Straps, crafted specifically for this dimension, offers guaranteed compatibility and superior quality compared to generic alternatives. Always verify that the end links are internal and the width is precisely 22 mm.

How long does a natural leather strap last on an Oris TT3?

Longevity depends on material and exposure. A quality alligator or vegetable-tanned calf, worn regularly (5–6 days weekly), maintains structural integrity for 3–5 years before replacement due to wear or separation of the lining. Calf exposed to prolonged moisture or direct heat deteriorates more rapidly. Regular maintenance—damp cleaning, thorough drying, and conditioning with neutral creams—substantially extends durability.

The next step

The right strap isn't chosen. It is built, together.

From the atelier appointment to delivery, every step is made for those who know that things done well take time. Rare leathers, one piece at a time, eighteen months of warranty.

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Casati Milano · Via XX Settembre 15, Milan · by appointment only