This might be old news now - but I've just seen the Puch pic...
It's a Puch Challenger Pro. Cromoly race bike sold for around £175 back in 1983-ish. I owned one and it was my pride and joy!
Funnily enough, I've been trying to track one down for years, and managed about 3 months ago to find one. Almost completed it's full restoration, and fully intend to take it back to the track. I've even got the old BMX action bike with the original review that made me buy the bike - brilliant value for money, decent parts and a full cromo f+f. It was about the same as a Silver Streak, but far better angles, lighter etc. All depended on whether you could handle a bike without a big name!
And this is the only other one I've seen in the last 30 years (apart from the one I bought!).
So, there you go. If you want any more details on spec then let me know. And if anybody has any more info / background on the model then I'd appreciate it. I seem to remember the frame was made by somebody else and just carried the Puch badge. Anyway, it was nothing like the rest of the Puch models I've seen - and I don't think it was ever out in the states.
Hope this is still of some use!