New vintage copper thick chain bracelet

New vintage copper thick chain bracelet Thick solid copper Classic curb chain Sliding-locking clasp (very common from this manufacturer but I can’t find the name of this clasp) More rustic industrial and edgy looking with the dark copper colour and black finish 7.5” (8” including clasps) 7 mm wide, 4 mm thick New vintage c. 1970s. Genuine copper. Probably hand finished and made in Mexico. (Most of my copper is from Canada or Mexico). Usually there are stamps or packaging but I don’t see anything here. (Will look again later) Looks like a dark rose gold but is definitely less expensive than rose gold! Western country rustic industrial vintage eclectic grandpa unisex edgy Middle group of pictures shows other pieces in the collection