Arnold & Son
Royal Collection 1TBAS.B01A.C113S— lug 20mm
Arnold & Son Royal Collection 1TBAS.B01A.C113S: 20mm strap. Alligator, box calf, shell cordovan and rubber, cut and stitched in Milano. Choose your leather.
Artisanal Note
"This model requires a precise 20mm lug width to preserve the original sartorial balance."
Technical Specifications
Arnold & Son 1TBAS.B01A.C113SThe essential strap measurement.
Browse 20mm straps →1TBAS.B01A.C113S
Arnold & Son caliber A&S5003 NAC Hours, Jumping Seconds, Minutes, Small Seconds
The Heritage
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Selected for the 20mm lug width of the Royal Collection
FAQ
What is the lug width of the Arnold & Son Royal Collection 1TBAS.B01A.C113S?
The lug width of this model is 20 millimetres. This is a standard width for chronographs of this case diameter, maintaining correct visual proportions between the 46mm case and the strap. The 20mm measurement represents the design equilibrium between case mass and strap lightness—a deliberate choice by Arnold & Son's manufacture to ensure aesthetic harmony.
Which strap is recommended for the Royal Collection 1TBAS.B01A.C113S?
For a chronograph of this calibre, we recommend straps in alligator with vegetable tanning (cognac, deep mahogany or black), or box calf in burgundy or black for those preferring natural patina development over time. For sport configurations, a NATO in natural weave or a natural rubber strap in black offer durability and versatility. The steel deployante buckle enables micrometric adjustment ideal for 20mm lugs.
How do I change the strap on my Arnold & Son Royal Collection?
Strap replacement requires a specific tool called a spring bar remover, allowing lateral movement of the lug to disengage the strap from the case's metal lug socket. Since the lug is integrated to the Royal Collection, it remains fixed: the strap slides between two anchorage points. We recommend operating with care and a stable work surface, or entrust the operation to a specialised watchmaker. Atelier Casati Milano offers strap change services by appointment for those seeking professional execution.
Is an aftermarket 20mm strap compatible with the Arnold & Son 1TBAS.B01A.C113S?
Yes, any strap with a 20mm lug width is compatible with this model, regardless of brand or material. What matters is appropriate strap thickness (typically 2.5–3.5mm) and perfect alignment of anchorage points. Milano Straps maintains a comprehensive catalogue of artisanal 20mm straps verified for dimension and construction quality.
How long does a leather strap last on an Arnold & Son Royal Collection?
A high-quality alligator strap with vegetable tanning, worn with seasonal rotation (not daily), maintains structural integrity for 8–12 years. Durability depends on use, climate and maintenance. A box calf strap subjected to daily wear typically lasts 4–6 years before restoration. Natural rubber lasts 5–7 years. With vegetable tanning, the material develops intentional patina and creasing that amplifies ageing aesthetics. We recommend alternating straps and storing unused straps in a dry environment.