Well, the reason for the "weird" was searching Classic and Vintage gives you a whole 3 hits on Peugeot and 3 speed... and at least one is for a folder. I've been googling around, and it looks like Peugeot maybe did make some 3 speeds, but they're not at all common, with around 30 hits. The one good description I found mentioned a full chaincase.

I'll be heading over to the shop in a couple hours, so I'll take a good look at the crank and check for stickers. Can't do pictures... no camera Also gives me a chance to get in a good long test ride to see how the bike works in terms of the hand pain I've been having.

*digs through catalogues*