Sterling Silver Cufflinks - Terrier Fronts | Mechanical Heads that Turn

Dating to the 1950s/1960s or so, may I offer this pair of Sterling Silver (hallmarked as pictured) cufflinks featuring a pair of terriers to the front. The pieces are mechanical in that the heads of both dogs move back and forth. Fronts measure 5/8" wide x 1/2" high. Combined weight of the pair is 9.3 grams. Condition is very fine with no problems I can spot - just a lovely vintage patina to the silver.