This pair of clips is a mystery - they appear to be silver - and the tiniest squiggle (too small to photograph), centered on the inside of one looks like "925" but the numbers are not in a straight line - could this be a hallmark? Also, the red stones are beautifully faceted and appear to be very carefully set with four beads of what appears to be solder on front and secured with rivets-like settings on back - would the maker go to so much trouble to secure glass or paste? Both backs of this pair is stamped "EB" and I assumed it was "Engel Bros" - but the EB are not within the sharp-lined traditional diamond shaped stamp I have seen in photos of other Engel Bros pieces... Finally - Can anyone tell by the construction if these are Dress or Shoe clips - or possibly Belt Buckles? They are hinged and have a confusing tab that looks like it was intended to be threaded with something - I have searched online for weeks - any help would be gratefully appreciated!