For WB Original straps with alug width between 18-20mm you need to get the 16 mm buckle, and for straps with a lug width of 21-22 mm you need to get the 18 mm buckle. Of course they fit also other leather straps, if they have the same width at the buckle. The buckle has spring bars and is easy to change with a spring bar tool.
16 mmbuckle = for watch straps with 18 mm, 19 mm & 20 mm lug width
18 mmbuckle = for watch straps with 21mm & 22 mm lug width
Note: If you would like us to attach the gold buckle on your new WB Original strap, you can leave us a message in the field at checkout.