A field watch was always meant to change straps. Ours are the patterns that went with the originals: canvas and nylon NATO straps, the leather Bund strap, the Perlon weave, tropic rubber and the Bonklip steel bracelet. Each comes in the lug widths our watches use, 16, 20 or 22mm, and fits most other watches with the same width. Shop by width: 16mm, 20mm, 22mm, or by type: NATO and nylon straps. Read more
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Watch strap guide
Find your lug width
Lug width is the gap between the two lugs where the strap meets the case, measured in millimeters. Each Praesidus product page lists it, see our field watches. If you are fitting another brand, measure between the lugs with a ruler or check the maker's specifications. A strap one millimeter too narrow will rattle; one too wide will not fit.
Which strap for which day
Canvas and nylon are light and suit warm weather and outdoor use. A NATO-style strap passes under the case, so the watch stays on the wrist even if one spring bar fails. Perlon is a woven synthetic strap with no holes, so it adjusts to any length. Leather dresses a field watch up; the Bund adds a leather pad under the case, first used by WWII aircrews in cold cockpits. Tropic rubber handles water, and the Bonklip steel bracelet adjusts link by link for a looser, vintage fit.
Looking for leather that handles a warmer day? See our DuoHide leather watch straps.
Fitting a strap
Our straps fit standard spring bars. A spring bar tool makes the job easier and protects the case from scratches.
Watch strap questions
How do I know my watch's lug width?
Check the lug width on your watch's product page, or measure the inside gap between the lugs where the strap attaches, in millimeters. Don't use the case diameter or buckle width. Lug width determines whether the strap attaches correctly; strap length determines whether it fits your wrist.
Will Praesidus straps fit other watches?
Our 16, 20 and 22mm straps fit many watches with matching lug widths and standard strap attachments. Width is the starting point, not a universal fit guarantee: check spring-bar fit and clearance between the strap and case. Watches with integrated or proprietary fittings may need a model-specific strap.
What is a Bund strap?
A Bund strap is a leather strap with a wide leather pad that sits between the watch and the wrist. It was used by WWII aircrews to protect the wrist from a cold case in unheated cockpits. The pad keeps the caseback off your skin, but adds more bulk than a regular two-piece strap.