Sounds like a series 5 or 6 adaptor with plain glass filters - I've seen a few, usually a push on fitting for old folding cameras. Everything is worth something to someone - put them on ebay and see what happens? AndrewF >I've been going through a desk drawer and discovered a set of color >filters for b&w film that my father must have used with his leica >lenses. They're tiny and I there an attachment to screw on the lens >that you put the filter in and a ring to screw the filter holder in >place on the attachment. I'm sure some of you know what I'm trying >to describe here. > >anyway they seem to be Kodak filters, not Leitz or Tiffen or such. >And they're not in terrible condition although the nice leather case >they lived in is so brittle that when I tried to open it pieces of >leather snapped right off and I had to pry the snaps open with a >knife blade. > >Are they worth anything at all?