I've acquired quite a few older eyepieces but this one doesn't really fit in as the rest are Plossls.
It's a nice 64 degree wide field eyepiece. I believe the design was essentially a copy of Tele Vue's Wide Field eyepieces of the time. This is the second version with rubber eyecup.
Condition is very good. Includes original box and (I think) a bolt case.
Note: Picture from web - photo of actual EP to follow.
Asking $80 ono. See my wanted ads if you'd like to trade.