Thanks everyone. Yes, they are cool, and rare, which helps with the cool.
The factory made the 1000 (cc) inline 4 cyl versions - rear engine, air-cooled in 1964, and latter added a Sportier TT version, and later an even sportier TTS (dual 40mm side drafts, higher compression, bigger cam, decklid propped open) that made around 75hp, or around 100 with the 'race' kit that was basically a different cam and a header I think. But they were known for being giant killers. 100-120 hp out of a 1000 (there was also a 1200cc version) that weighs 1400lbs wet - stock! means it can beat up on a lot of pretty powerful but heavier cars sometimes.
They are actually raced today in Europe and have a pretty hard core following, but are almost unheard of in the USA. I bought a very early 1964 model and am building it into a vintage racer/track day/sunday canyon car.
Here's a pic for scale of it sitting on my trailer behind the van. Almost looks like a toy.