This is a set of 4 authentic Swiss-made OMEGA stainless steel Clasps/Buckles in various designs.
Clasp A
18mm width; end-to-end clasp for "close-loop" bracelets
Clasp B
18mm width; end clasp for "open" bracelets
Clasp C
14mm width; clasp for leather bands
Clasp D
14mm width; clasp for nylon/canvas bands