Strap for Patek Philippe 3940 Perpetual – Black Boxed Calfskin

Strap for Patek Philippe 3940 Perpetual – Black Boxed Calfskin

Name: Strap for Patek Philippe 3940 Perpetual – Black Boxed Calfskin
Brand: JPM
SKU: TP-JPM-1013-18-14-R
Price: 110.0 EUR
Availability: InStock

€110,00

Sizing information:

Sizing
Length: Regular 11,5 + 7.5 cm (4.72 + 2.95 in.)

Lug Width/Buckle Width:
18 mm/14 mm

Thickness: ~1.9 mm (0.075 in.)

LUG WIDTH IN MM:

18-14

Variant

Modern Classic

Boxed Calfskin — Subtle Structure

Black, but not as you expect it — chosen to avoid the obvious.
Crafted from smooth calfskin with a subtle boxed construction, this strap introduces just enough texture to move away from the traditional black alligator. It sharpens the 3940, adding clarity and contrast, while keeping a softer, more personal edge.
Slim and comfortable at 1.9 mm, it gives the watch a slightly more contemporary presence. Still classic, but less predictable — a refined alternative for those who know the difference.

Designed for the 3940 - Perfect 18/14 Taper

This strap is specifically designed for watches like the Patek Philippe 3940, featuring a refined 18 mm to 14 mm taper.
This elegant reduction is essential for the proportions of classic perpetual calendars, enhancing the slim profile and allowing the watch to sit perfectly balanced on the wrist.
The 14 mm buckle width ensures full compatibility with original Patek Philippe buckles as well as folding clasps.
Please note: when using a folding clasp, the strap may wear slightly longer on very small wrists due to the fixed clasp position.

Quick Release Spring Bars

Quick Release - Change Without Risk

This strap can be fitted with quick release spring bars, allowing you to change straps easily without the need for tools.
By sliding the small integrated lever, the spring bar retracts smoothly, making installation and removal quick and controlled.
This reduces the risk of scratches on delicate gold cases — a practical and thoughtful solution, also used by Patek Philippe on many of their modern straps.
Effortless, safe, and perfectly aligned with high-end watchmaking.