Strap for Master Collection Date 38.5 Two Tone Black

The lug width is 20 mm. This measurement is specific to the Master Collection family and represents the distance between the inner edges of the two lugs on the case. It is essential to verify this dimension before ordering a strap to ensure perfect compatibility and avoid lateral gaps. Measurement is performed by placing a ruler perpendicular to the lugs' axes.

For the two-tone (yellow gold and stainless steel), we recommend dark brown or burgundy alligator, which complements without competing with the precious metal. Shell cordovan in cognac tone is ideal for those who appreciate patina development. Black calf remains the universal choice: it eliminates chromatic risks and allows the two-tone to shine. For versatility, vegetable-tanned calf in natural brown tones ensures initial suppleness and settling memory. Dark grey cotton NATO for casual weekend wear.

The change requires a spring bar tool: a small metal lever with two hooked ends. Position the hook into one of the lug holes (visible laterally) and gently lift the spring bar—the elastic pin holding the strap. The pin will snap out, freeing one side of the strap. Repeat on the opposite lug. For installation, position the new strap under the lugs and reinsert the spring bar, ensuring the elastic pin is fully seated. A reversible and non-invasive operation.

Yes, provided it strictly meets specifications: 20 mm width, attachment end thickness not exceeding 2.8 mm, total length appropriate for your wrist (typically 75–80 mm on the lower side and 120–140 mm on the upper side). Artisanal aftermarket straps are preferable: they often use superior leather to factory straps. Verify that the case lugs show no imperfections that would obstruct spring bar placement.

A quality alligator strap lasts 5–8 years with daily wear, thanks to the skin's natural density. Shell cordovan extends to 8–12 years, developing patina. Vegetable-tanned calf lasts 3–5 years with intensive use, 6–8 years with strap rotation. Longevity depends on perspiration exposure, humidity, and strap hole wear (enlargement over time). An FKM rubber strap maintains elasticity for 3–4 years before losing flexibility. Store straps away from direct light and extreme humidity to maximise longevity.