Deployment Clasp Marking — What This Mark Means

Deployment clasps fold over rather than using a simple pin-and-buckle closure. Markings on them typically include the brand logo, clasp width, material type, and sometimes a model or part number. These markings help identify the correct replacement parts and verify the clasp is original to the watch.

Look on the inner surfaces of the clasp when fully opened. Markings are commonly stamped on the underside of the folding plates, the push-button mechanism housing, or along the inner edges.

Deployment clasps come in butterfly (double-fold), single-fold, and push-button varieties. Markings may include width measurements (e.g., 18mm, 20mm), material stamps, and brand-specific identifiers.

The correct spelling is "deployant" (from French), though "deployment" is now commonly accepted. People sometimes assume all deployment clasps are interchangeable at the same width, but clasp design, thickness, and attachment method vary significantly between brands.

Note the clasp width and type markings for replacement purposes. If the clasp feels loose or doesn't lock securely, have it inspected. Worn deployment clasps can fail unexpectedly, potentially causing the watch to fall from your wrist.