It's not quintessential, but it's fun, in a weird kind of way, and stylish: "What's up, Tiger Lilly". Woody Allen took a Japanese police/spy film and dubbed it with surreal dialogue. Be warned, despite some great moments, the absurdity of the whole thing is at times tedious. But it still is an interesting piece of cult filmography. The Tenth Victim is great, with its light-hearted and futuristic depiction of a world where war and crime have vanished due to the Game, where participants become alternatively prey or predator, trying to kill eachother. Marcelo Mastroianni and Ursula Anders are great, and the costumes are brilliant. And on a tangent, this is a great site for 60s style, interior design and spy movies:
http://www.spyvibe.com/