Articulated Medieval Knight "Jumping Jack" Pendant or Charm - Arms & Legs Move

Dating anywhere from the early 1900s to the 1950s, may I offer this Silver (exact content unknown but a magnet does not stick) mechanical pendant or charm. Depicting a medieval knight, the arms and legs of the gent move to and fro. Height is 1-1/4" (to top of bale) x 9/16" wide; weight is 2.1 grams. Condition is very nice with no problems I can spot. All that's needed is a jump ring for the top - if I'm reminded, I will add one before shipping. A very rare find!