Ivo,
Thanks. I know wear patterns aren't conclusive, but I would think it goes back maybe to the 1970s.....assuming they were being produced then. I've always thought these were made over a long period (maybe still being made).
The size may not be exceptional in Europe, but I think it is in the US. Not sure if these were ever exported directly to the US, or if what shows up here is only what people bring back from visits. That last possibility would significantly affect the sizes that show up here. Any suggestions for keywords if I put it on eBay?
Forrest