Thanks for
looking at this Underground auto-tele converter for Pentax PK mounts. This is
one item of many vintage cameras and photography items I recently purchased so
be sure to check my other and future listings. This Underground brand
tele-converter looks like it has had little use if any. It comes in its
original case shown. It is for the Pentax PK mount cameras. A nice item to add
to any vintage photography collection.