Hello Paul, I wouldn't really know either. They made a lot, all different styles and uses.
I bought a beautiful lampshade, cased coloured glass that was quite thin and arrived in 1000 pieces. The shade was not marked, but the fittings were.
I'm not positive your thing is not a marriage.
All I can suggest is to search Peill & Putzler in ebay and see what comes up! (I always have to search worldwide to get it to come up)