Oris · TT3

Strap for TT3 Day Date Titanium / Black / Rubber

Takes 20 mm straps. Verified lug width, the straps that fit this model, and answers to the most common questions.

Lug width20 mm
Case diameter44 mm
Reference01 635 7589 7064-07 4 28 02T
FamilyTT3
MovementOris caliber Oris 635 hours, minutes, seconds | date, day
CaseTitanium

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 01 635 7589 7064-07 4 28 02T

Selected for the 20 mm lug width

All 20 mm straps →

The TT3 01 635 7589 7064-07 4 28 02T, seen from the bench

The TT3 represents a sporty proposal in the Oris catalog, equipped with the automatic Oris 635 caliber. The movement offers indication of hours, minutes, seconds, date and day of the week. The reference 01 635 7589 7064-07 4 28 02T identifies this specific configuration of the model.

Frequently asked questions

What is the lug width of the Oris TT3 01 635 7589 7064-07 4 28 02T?

The lug width of this model is 20 millimetres. This measurement is essential for selecting compatible straps, as adapting straps of adjacent widths (18 or 22 mm) would compromise both aesthetic integrity and ergonomic fit on the wrist.

Which strap is recommended for the Oris TT3 01 635 7589 7064-07 4 28 02T?

For this titanium tool watch, we recommend alligator leather (dialogues with the calibrated bezel), vegetable-tanned leather (develops authentic patina over time, amplifying the technical character), or technical rubber (emphasises professional identity). Choice depends on use: formal elegance, daily versatility, or pure function.

How do I change the strap on my Oris TT3 01 635 7589 7064-07 4 28 02T?

Use a spring bar tool to unlock the lugs fitted into the case attachments. Position the tool in the spring groove, push downward to compress the spring, then extract the spent strap. Insert the new strap by aligning the lugs, and verify the spring is properly engaged. Avoid hammers or improper tools.

Are aftermarket straps compatible with the Oris TT3 01 635 7589 7064-07 4 28 02T?

Yes, all straps with a 20 mm lug width are compatible. Always verify this dimension: the titanium attachments on your watch do not allow variations. Milano Straps offers a curated selection of leather, NATO and rubber straps, calibrated for this width.

What is the lifespan of a leather strap on the Oris TT3 01 635 7589 7064-07 4 28 02T?

A vegetable-tanned leather strap lasts 3–5 years with daily use, developing authentic patina. Alligator leather, being more resilient, reaches 5–8 years. Longevity depends on ambient humidity, sun exposure and perspiration. We recommend seasonal rotation (rubber in summer, leather in winter) to extend service life.

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