Back in the day the Bultaco Alpina was a very popular trail/enduro bike here in New England and I believe it even won a few enduro championships. Very trials oriented bike.
I love vintage stuff. On my want list is a 1977 Penton 175 GS6 (high breather frame and last year for Penton), an SWM of about the same vintage and also a Hercules with the 7 speed tranny.
There is a guy in NJ (pinerider I think on KTM Talk) that has an absolute amazing collection of vintage bikes. Literally hundreds of them and some in showroom condition. I want to make the trip down from MA at some point just to take it all in and do some drooling. I'm betting that Glen (GMP) knows of this guy since he also lives in NJ.