I still have my 1978 Puch Brigadier. Looks like it has the 100th Anniversary stickers on it. I'm the original owner. It was purchased from Campus Cyclery in Cincinnati OH. The frame has a lifetime warranty, although I have no idea where I'd send it now if it broke. I've ridden it so much that the front rim is getting thin from being worn out by all the brake pad action. The back rim was replaced about 10,000 mi ago. Now it's in need of a full drivetrain replacement. My guess is that it probably has 30-40,000 miles on it, most of it commuting mileage with sometimes ridiculous loads, although I myself am a lightweight. Surprisingly, the Soubitez bottom bracket generator still works although the steel roller has a groove worn into the center from tire contact.
I have the original manual and maybe the model guide, too, which I could scan and email or maybe post if you're interested.