Open-Ended Barenia Strap for a 1930s Nivada

Two constraints came in with this order, and they pull against each other. The watch is a Nivada from the 1930s with bars that cannot be removed, so the strap has to be open-ended — a loop that wraps the bar rather than a tab that sits on it. And the case is small. In the customer’s words: “strap has to be rather thin to fit. Watch itself is rather narrow at 19mm.” The answer was Barenia, cut 75/125 mm to a 12 mm slim stainless buckle.

Strap specifications

Strap type	Custom open-ended
Leather	Barenia
Length	75/125 mm (3.0 in / 4.9 in)
Buckle width	12 mm (0.47 in)
Buckle	Slim, stainless steel
Watch	Nivada, 1930s

Why these choices

On an open-ended build, leather thickness stops being a matter of taste. The loop has to close around a bar that is already in the case, and every extra tenth of a millimeter in the hide is a tenth the loop has to find room for. When a customer says the strap has to be thin, that is a fit specification, not a preference — so the build was skived down through the ends and kept flat, with no padding.

Barenia is the right hide for that job. It is hot-stuffed, which means the fats are driven into the leather rather than sitting on the surface as a finish, and it comes out of an equestrian tradition where straps were expected to flex under load without splitting. Traditionally it is also water-resistant. The practical effect on a thin strap is that taking material off does not leave it brittle: the leather is conditioned all the way through, so a skived end still behaves like leather rather than like card.

The 12 mm buckle follows the case, not a catalog. Most makers stop at 16 mm or 18 mm, which is why owners of small pre-war watches end up with a tail that swamps the watch. VGreen’s configurator goes down to 8 mm, so 12 mm is an ordinary order. At 75/125 mm the strap is 200 mm overall, cut to the wrist on the order rather than to a stock size.

Questions about this build

Why does a 1930s Nivada need an open-ended strap?

Because of how the bars are fitted. Watches of that era frequently carry bars that are part of the case rather than removable spring bars, and a conventional strap has nothing to thread onto. An open-ended strap ends in a loop that passes around the bar and closes back on itself, so the case is never touched.

How thin can the strap actually go?

Thin enough that the loop closes without forcing. Say so on the order — “has to be rather thin to fit” is exactly the right note — and give the width you need at the case and at the buckle. The two do not have to match, and on this build the buckle is 12 mm.

Every strap is cut and skived to the numbers on the order, so allow 2–3 weeks to delivery. If your vintage watch has bars you cannot remove, start with the custom open-ended strap; the same build is available across the Barenia range and the wider custom leather strap configurator.