Arnold & Son · Royal Collection

Strap for HMS1 Victory

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

Lug width20 mm
Case diameter40 mm
Reference1LCAP.S05A.C111A
FamilyRoyal Collection
MovementArnold & Son caliber A&S1001 hours, minutes, small seconds
CaseRose Gold

Spring bar

Swiss Standard universal spring bars

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

Straps for the Royal Collection 1LCAP.S05A.C111A

Selected for the 20 mm lug width · workshop selection

All 20 mm straps →

The Royal Collection 1LCAP.S05A.C111A, seen from the bench

The Arnold & Son Royal Collection is powered by the A&S1001 caliber with hours, minutes and small seconds indication. The movement offers a classic three-hand configuration with a subsidiary seconds dial. The collection represents the brand's traditional approach to time complications.

Frequently asked questions

What is the lug width of the Arnold & Son Royal Collection 1LCAP.S05A.C111A?

The lug width is 20 millimetres. This measurement represents the space between the two lugs of the case where the strap attaches. You can verify it by placing a ruler across the lugs, excluding the case curve: any 20mm strap will be perfectly compatible with this model.

Which strap is most suitable for the Arnold & Son Royal Collection 1LCAP.S05A.C111A?

The ideal strap depends on usage: for formal occasions, we recommend alligator in black or cognac, or shell cordovan in burgundy. For smart-casual, vegetable-tanned calf in siena tonality creates chromatic harmony with the rose gold case. For versatility, a NATO in blue or black offers grip and functionality. FKM rubber represents the superior technical choice for outdoor activities.

How do you change the strap on the Arnold & Son Royal Collection?

Remove the watch from your wrist. Using a spring bar tool, insert the flat end between the lug and strap, pressing gently downward to release the internal spring. Repeat on the other side. Remove the old strap. Insert the new one by aligning the spring bar hole, then press upward until the spring locks into position again.

Must the strap be original Arnold & Son?

No. High-quality aftermarket straps, such as those selected by Milano Straps in 20mm, often offer superior construction quality and more precious materials compared to stock straps. What matters is that the lug width is exactly 20mm and the strap is crafted from noble materials—vegetable-tanned leather, alligator, shell cordovan, or FKM rubber.

How long does a leather strap last on a watch like the Arnold & Son Royal Collection?

A quality leather strap (alligator, vegetable-tanned calf, shell cordovan) lasts on average 3–5 years if worn daily, up to 10–12 years if used occasionally. Longevity depends on humidity exposure, temperature fluctuations, cleaning frequency, and care. FKM rubber has superior durability (7–10 years of intensive use) thanks to chemical and thermal resistance.

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