This is a beatiful EP that appears unused. It includes the original box, caps, and paperwork. I understand that it is designed to extend the old Pentax ortho line up to this focal length. It is basically identical to the orthos, including the .965" format, and is discontinued just like the orthos. One sold on Astromart last week for $125.
I'll take $120 shipped CONUS.
+$3 for Paypal
I've also got a nice Vixen .965" 2x barlow I will throw in for $20.