Thanks for the info. I regret that I passed it up at first glance, but at least it was there when I got back! It's a 5-speed, so 70s maybe?
I would like to find a spec list for it so I could replace some parts. I know I at least need to get some brake levers, which it appears can be picked up for cheap on eBay.
The most important question: Does it have a name? "The Puch 100 Years" just doesn't sound right.