Southwestern Natural Turquoise Bracelet in Sterling Silver

Vintage 1970s Southwestern sterling silver bracelet that is set with natural blue turquoise that has black matrix. May be Carlin Mine turquoise. 

Bracelet one had a beaded center piece that was removed for some reason. Probably broke. You can see remnants of it on the back of the setting and at the terminal tips. 

Measures 1 1/2" wide. Interior measures 5 1/4" plus the opening of 1 1/4". No hallmarks. Acid tested. Weight: 21.6 grams.