Lupin the Third is a really cool series, with a great premise and cast. The most well-known iteration is the second TV show, which ran from 1977-1980. It had a fairly unique art style that was different from most anime, although no animated Lupin ever really captures the insanity of the comics. Monkey Punch's original art is fantastic. It's got more energy than any other comics I've ever seen. Here are some images from it, although only the very last picture really captures what I'm talking about.