Security buckle for wrist watch metal bracelets

A security buckle for attaching together two portions of a band comprising:

• a first frame work having a pair of longitudinally disposed lateral side walls interconnected by a first traverse element at a forward end of the sidewalls and a second traverse element at the rearward end of the sidewalls,
• a second frame work fitted within said first frame work for limited sliding movement with respect to said first frame work between a first and second relative rest position, said second frame work including a downwardly projecting traverse portion, and a raised spur adapted to abut said first traverse element,
• an inflexible removable third traverse element mounted to and extending between said sidewalls and disposed under said second traverse element, said third traverse element positioned to cooperate with said traverse portion to lock said second frame work against rearward sliding movement with respect to the first frame work, said third traverse element being attachable to one of said two band portions, said second traverse element and inflexible removable traverse element forming a space therebetween, said space being partially occupied by a rearward portion of said second frame work,
• a locking band attachable to the other of said two band portions to form the end part thereof, said locking band comprising a plurality of successively connected identical links, each link being a two-piece assembly comprising a first rectangular housing piece including a pair of integral L-shaped claws at opposite longitudinal ends thereof extending outwardly therefrom in a widthwise direction of said housing piece for engaging with an adjacent link in said band, and a spring plate second piece mounted in said rectangular housing for engaging with the claws of an adjacent link to bias the claws and hold the links in a predetermined position, at least some of said links containing holes in respective housing pieces for engaging with said raised spur.