I've had and used a pair of Swarovski Habicht 10x40 porros that I bought at an optical shop in Salzburg, Austria, in 1982. While worn on the outside and a veteran of more hunts than I can recall, they are still superbly sharp and I wouldn't trade them for any of the new models.
Another sleeper on the used market are the older Nikon porros, Nippon Kogaku marked. I have several pairs, and they are sharp, light, beautifully made. Almost as good as my old Swarovskis...
