Found An Old Camera

Was looking for something else and happened to find what I am assuming to be another one of my Grandpa's old cameras. Haven't seen this one before, or else it was so long ago that I've forgotten about it.
It is a Prismat PCA V-90 with a Mamiya-Sekor 48mm 1.9 lens.
Anyone know much about this camera? It seems to be working rather well. Focus ring is rather stiff, but doesn't get stuck.
Film ASA range is from 6 to 800. Never knew that you could get anything below 25.
Were these good cameras? Still have some film floating around, may run a roll through it for fun.

Cool! Haven't heard f that one, but the ,ens has a good name. Never saw asa below 25 either, but maybe at some point...

Mamiya Prismat

Interesting camera from the link in the post above. A leaf shutter in the body is unique as far as I know. It could actually be worth something to collectors depending on condition. Too bad it wasn't the model with the Canon lens, but that was only available in Japan apparently and would have a different name.

Yeah, I found that website pretty easily. Was looking more for personal experience.