Actually, Peill & Putzler glass is really easy to identify. They nearly always have a double P etchmark on the base or on the outside near the base. It's not always easy to see, but once you're a bit familiar with the style of the glass, you'll start looking for it almost automatically. The factory was located in Düren, West Germany, and they took over the Weisswasser Bärenhütte in East Germany in the nineties. I'm not sure what that will mean for your chances of finding some for yourself, Anik.