Iconic?
If you're meaning shapes and images that are ingrained into us so deeply that you recognize it and even get a little thrill at the sight, I think both fit that, but the ppk is more artistic and aesthetically pleasing. The ppk is, without a doubt, an icon in not only the shooting community, but the entire population as well.
As far as iconic weapons, I have to also give the luger and p38 that status, among only a few foreign produced guns. (I'm not handing that label out to anything less than 40-50 years old)
The model 29 in bright blue configuration has to be in the top ten, along with the python.
It's really interesting to think that you've got to put colt in the top ten with the 1911, SAA, python, and good old M16.
If you count universal recognition as part of that definition, in other words, even your wife will know that the PPK was a bond gun, you really hit a snag.
Winchester gets one in the list; the generic lever action. Everyone knows that if it has a lever, it's "a winchester." The brass framed henry (they're all henrys) belongs there, but winchester gets no credit for the volcanic or any other of their brass frames. . Remington, seriously, has no genuinely iconic firearms that would be recognized by anyone but a real shooting enthusiast that i can think of.