Vintage 1970s workshop sterling silver and twisted copper cuff bracelet. In those days many dads were making these in garages and workshops. My dad was one of them. This one is very nice in pulled square sterling silver wire with twisted copper wire in the center. The silver has black tarnish and a lovely patina. 

Interior measures 4 1/2” plus the opening 1 1/4”. It is 3/4” wide. The terminal tips are reinforced with sterling bars. Weight: 15.9 grams.