Yep, looks like the BP100 - one of the first useable pickups. I've still got one superglued to the bridge of my Clifton EUB. You have to use a preamp to get any low end out of it, can be a bit finger noisey, but still pretty good.
The sound improves dramatically if the fit to the bridge face is good (not with blueback, it needs to be flat surface to flat surface) but there should be more cable going through the bridge - if the wires get tugged where they join the pickup elements they will die...like most other pickups.
You can still get the metal clips from Thomann, but stationary clips also work, if memory serves me...