Very hard to find lens outside of Japan, only 6000 were made and only for the Japanese market.

It has a Pentamatic mount.

I believe this was made by Zunow Opt, but coupled possibly be Tomioka, there is very little info available online.

The optics are good, there are some light surface marks and sone light dust but generally good usable.

The focus is a little heavy but works and the 10 blade aperture moves well.

Some marks and spotting top the body.

Rare and unusual lens, would be a good lens to adapt or re-house or service and use.