NATO Straps 19 and 21mm

19 mm and 21 mm: the sizes nobody else stocks

Most stores stop at 18, 20, 22 and 24 mm. Yet some watches have 19 mm or 21 mm lug widths — odd sizes that leave their owners without a solution. La Boîte à Montres has chosen to fill that gap. If you are looking for a 19 mm or 21 mm NATO strap, you are in the right place.

Which watches have 19 mm or 21 mm lug widths?

19 mm fits the Omega Constellation and some De Ville models, as well as various vintage watches from the 1960s-70s with intermediate diameters. 21 mm is found on the Tudor Pelagos, Tudor Black Bay 41 and some older Breitling models. These are precise watches, often collectible, that deserve a strap in the exact right size.

Why does the right size matter?

A strap that is too narrow leaves unwanted lateral play and stresses the spring bars. One that is too wide simply will not fit between the lugs. The only correct solution is the exact size. That is why we stock these rare widths that others do not carry.

Original NATO construction

Like all our NATO straps, the 19 mm and 21 mm are made from a single piece of nylon. They thread under the case between both spring bars and wrap completely around the wrist. Marine-grade anti-corrosion stainless steel buckle and keepers — water-resistant, machine washable at 30°.

Other widths available

Neighbouring widths: NATO straps 18 mm and NATO straps 20 mm. Back to all NATO straps.

Frequently asked questions

How do I know if my watch has 19 mm or 21 mm lug width?

Measure the gap between your watch lugs with a calliper or millimetre ruler. If the measurement reads 19 or 21 mm, you are on the right page.

Why are 19 mm and 21 mm NATO straps so hard to find?

Mass-market retailers focus on the best-selling sizes — 18, 20 and 22 mm. Odd sizes represent lower volume and are ignored by most stockists. La Boîte à Montres takes the opposite approach: stocking the right size for every watch.