Oris · Big Crown

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

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 4064-07 5 22 77FC
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 4064-07 5 22 77FC

Selected for the 22 mm lug width · workshop selection

All 22 mm straps →

The Big Crown 01 745 7688 4064-07 5 22 77FC, seen from the bench

The Oris Big Crown features the Oris 745 automatic caliber with indication of hours, minutes, small seconds, date, and day of the week. The model has 22mm lugs and is distinguished by the oversized crown characteristic of the Big Crown collection. The reference 01 745 7688 4064-07 5 22 77FC represents a modern version of the brand's Big Crown line.

Frequently asked questions

What is the lug width of the Oris Big Crown 01 745 7688 4064-07 5 22 77FC?

The lug width is 22mm. This measurement represents the distance between the two strap attachments on the case, measured centre-to-centre. This specification is critical for compatibility: only straps with a 22mm lug width will insert correctly into the Big Crown's attachment points.

Which type of strap is most suitable for the Oris Big Crown 01 745 7688 4064-07 5?

The Big Crown pairs exceptionally well with leather straps featuring vegetable tanning (cognac, taupe grey, mahogany brown) which develop patina over time, creating aesthetic harmony with the brushed steel case. NATO straps in recycled technical yarn offer formal-to-casual versatility. For maritime or sports use, FKM rubber or silicone deliver radical functionality. Alligator leather introduces structured texture whilst maintaining sobriety.

How do you change the strap on an Oris Big Crown 01 745 7688 4064-07 5?

Strap change is accomplished via the spring bars located on both lug attachments. Using a spring bar tool or specialised instrument, apply gentle vertical pressure to compress the internal spring, then extract the bar from the anchor holes. Repeat symmetrically on the opposite side. Insert the new strap by aligning its lug holes with the bars, then press until the retention click engages.

Can I use an aftermarket strap on this Big Crown?

Yes, provided the lug width is precisely 22mm. All compatible 22mm straps (leather, NATO, rubber) will function mechanically. Aesthetic compatibility depends on your preference: we recommend straps of construction quality comparable to the Oris case to avoid tactile and ageing discrepancies. Artisanal straps in vegetable-tanned leather or technical NATO guarantee longevity.

How long does a leather strap last on an Oris Big Crown?

A high-quality vegetable-tanned leather strap, with proper maintenance, lasts 3–5 years with moderate daily wear. Longevity depends on ambient humidity, direct sun exposure and frequency of use. Vegetable tanning develops fascinating patina during the first year. If exposed to extreme moisture or prolonged heat, durability diminishes. Technical NATO straps, being synthetic, last 5–7 years with minimal maintenance requirements.

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