File:Diver's watch stainless steel bracelet extension deployment clasp.JPG - Wikipedia

Watch strap - Wikipedia

41mm wide steel case, green dial,13.5mm thickness, lugs width 20mm.Japan 2115 quartz movement, mineral strengthened crystal, luminous,excellent

ADDIESDIVE Quartz Dive Watch for Men Diver 200M Steel Strap Luminous Multicolors Dial Black Blue Green

Garmin MARQ Series Hands-On: Everything you ever wanted to know

Watch Band Divers Clasp, Watch buckle, Metal clasp

Types of Watch Bands - the Watch Bands Wiki

These deployant buckles are made to replace the regular leather watch band buckle. Why would you change buckles? Because deployant buckles will give a watch band a really great finished look that is similar to that of a name brand watch, and because deployant buckles are more secure than a standard buckle that will also provide a little extra length.

Esslinger Company Watch Band Clasp Stainless Steel Deployant Buckle with Push Button and Spring Action | Esslinger

WOE Dispatch

What Do You Know About Your Watch Divers Clasp?

MiLTAT Turning Clasp stainless steel Diver watch clasp