Rolex
Bubbleback 5050— lug 17mm

The Rolex Bubbleback 5050 features a lug width of 17 mm. This measurement is characteristic of Rolex models produced in the 1940s and is incompatible with the standard 18 mm or 20 mm straps currently available. It is advisable to verify the measurement using a digital calliper placed directly between the lugs, flush against the case.

For the Bubbleback 5050, a vegetable-tanned alligator or shell cordovan strap is recommended, as both develop a patina that harmonises with the natural ageing of the vintage dial. Box-calf leather is a more understated alternative. For everyday wear, a woven nylon NATO strap protects the lugs from abrasion. The choice ultimately depends on the chromatic pairing with the dial and the intended style of use.

Replacing the strap on the Bubbleback 5050 requires a fine-tipped spring bar tool, preferably with a 1.0–1.5 mm forked tip, to remove the spring bars from the lugs without scratching them. Given the age of the watch, the original spring bars may be corroded or brittle and should be replaced with appropriate steel bars. For pieces of collectible value, it is advisable to entrust the operation to a watchmaker experienced in vintage Rolex timepieces.

Yes, aftermarket straps produced in the 17 mm lug width are available, both as bespoke artisan pieces and in limited production runs. Milanostraps.it offers a selection of 17 mm straps compatible with 1940s Bubbleback models, crafted in quality leather with steel or yellow gold buckles to match the case finish. It is important to specify the desired tip width, typically 14–16 mm, to ensure a proper fit.

The longevity of a leather strap depends on the quality of the hide, frequency of use, and exposure to perspiration and moisture. A premium vegetable-tanned alligator strap, with regular but non-sporting use, typically lasts 2–4 years before the lining or stitching requires replacement. Shell cordovan tends to outlast most leathers due to its dense fibrous structure. Storing the watch without its strap during periods of non-use significantly extends the lifespan of the leather.