Wow, you're good. I found a picture of a 197? Univox Gimme (attached) which has these pickups and the knobs that came with them. Are these pickups any good?
"Good" is in the ear of the beholder.
If they work, I'm sure there's an application out there for them.
In fact, there are actually people collecting early Univox pieces who may be looking for a working unit.