Oris · Big Crown

Strap for Big Crown Small Second Pointer Day Stainless Steel / Black / Bracelet

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

Lug width22 mm
Case diameter44 mm
Reference01 745 7688 4034-07 8 22 30
FamilyBig Crown
MovementOris caliber Oris 745 hours, minutes, small seconds | date, day
CaseStainless 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 Big Crown 01 745 7688 4034-07 8 22 30

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Big Crown 01 745 7688 4034-07 8 22 30, seen from the bench

The Oris Big Crown 01 745 7688 4034-07 8 22 30 is an authentic tool watch rooted in 1938 military aviation heritage. It features an Oris 745 automatic movement with hours, minutes, small seconds, and day-date functions. The stainless steel case measures 44 mm in diameter with a screw-down crown for enhanced movement protection. The 22 mm lug width is proportionally designed for this case size, and the clean dial with Arabic numerals reflects Oris's commitment to functional simplicity without unnecessary ornamentation. Water-resistant for light diving and daily demanding use.

Frequently asked questions

What is the lug width of the Oris Big Crown 01 745 7688 4034-07 8 22 30?

The lug width of the Oris Big Crown 01 745 7688 4034-07 8 22 30 is 22 millimetres. This measurement is critical when purchasing a compatible strap: it must be precisely measured between the lugs to ensure proper fit without play or forcing.

Which strap would you recommend for this Oris model?

For the Big Crown 01 745 7688 4034-07 8 22 30, we recommend a vegetable-tanned leather strap of supreme quality, such as Tuscan calf in tobacco brown or black. Alternatively, a robust canvas NATO strap offers maximum aesthetic versatility and daily practicality. Rubber is ideal for those intending to wear the watch in damp environments.

How do you change the strap on an Oris Big Crown?

The strap is changed by removing the spring bars from the watch lugs. Using a dedicated strap removal tool, compress the spring bar laterally to extract it from one lug, then slide off the old strap. Insert the new strap into the first lug and reinsert the spring bar, then repeat on the opposite lug. The operation takes approximately 2-3 minutes and requires no technical skill.

Is an aftermarket strap compatible with the Oris Big Crown 01 745 7688 4034-07 8 22 30?

Yes, any 22mm strap is compatible with the Big Crown, provided it is specifically designed for 22-millimetre lugs and features standard spring bars. Milano Straps' products are all manufactured to professional specifications and guarantee complete compatibility with this Oris model.

What is the expected lifespan of a leather strap on this watch?

A quality vegetable-tanned leather strap, worn daily, typically lasts 2-4 years before requiring replacement. This estimate depends on intensity of use, climate conditions (humidity), cleaning frequency, and the quality of tanning. Tuscan leather straps develop a natural patina over time, increasing in aesthetic character through controlled ageing.

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.

Request an appointment →

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