I'm not the expert, but I believe they were made by all the big pen makers at various times and others, but typically sold under lower-tier brand names, AFAIK. I don't think you'll find them stamped into the barrel with Parker, Waterman, or Wahl, for example.
They're pretty neat, but very, very variable. Some ugly, some downright pop-art, some beautiful. Hard to find with any consistency, IME.
Post a WTB every month or two and watch out here. I've seen 3-4 FS over the past two-three years here or on PenTrace.
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QUOTE (penspouse @ Aug 25 2008, 05:24 PM)

I have seen two references to "end of day pens" in the last month where various plastics left over at the end of the day were put together to form a mosaic. I had not hear of these before. Who made them? When were they made? Where can I find one that writes or can be made to write? I want need one!!!