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Small differences.
A different fit.

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Same relative scaleDimension-based schematic
47.7 mm40 mm diameter53.4 mm43 mm width20 mm · reference scale
Rolex Audemars Piguet

Audemars Piguet B is 3 mm wider than A. Its lug-to-lug is 5.7 mm longer.

Actual size and fit may differ.Includes provisional specifications and simplified diagrams. On-screen size is not actual physical size.Disclaimer
THE DETAILS

Compare the dimensions

All dimensions in millimeters
SpecificationA RolexB Audemars PiguetDifference (B − A)
Case diameter / width40 mm Official43 mm Provisional+3 mm
Published case lengthNot available Not available —
Lug-to-lug47.7 mm Review53.4 mm Provisional+5.7 mm
Thickness12 mm Review14.4 mm Provisional+2.4 mm
Lug width20 mm ReviewNot available —

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Sources and measurement notes
Rolex · 126500LN

Listed in the official catalog on October 10, 2026

Case diameter: 40 mm · Official

Case width: Not available

Published case length: Not available

Lug-to-lug: 47.7 mm · Review

Thickness: 12 mm · Review

Lug width: 20 mm · Review

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Audemars Piguet · 26420ST

Initial catalog model

Case diameter: 43 mm · Provisional

Case width: Not available

Published case length: Not available

Lug-to-lug: 53.4 mm · Provisional

Thickness: 14.4 mm · Provisional

Lug width: Not available

The full reference is unconfirmed. The 43 / 14.4 / 53.4 mm dimensions are provisional comparison values and do not identify a specific dial configuration.

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