This is the Tele Vue 13mm Plossl, also known as the Circle NJ Smoothie.
Circle NJ refers to the specific maker mark on these eyepieces, "NJ" meaning "Nagler Japan". Tele Vue used a secret Japanese optical shop for their work, and the Circle NJ was the makers mark.
This is also a "smoothie", meaning it doesn't have a rubber eyecup, nor rubber armor on the sides and the barrel doesn't have an indentation for the diagonal set screw to catch.
Basically, if you've made it this far into my story, then you're probably specifically shopping for this eyepiece.
Clean, no scratches. Two black lens cap (top and bottom), they both fit tightly but I do not know if they are original. No box.
I can supply more photos upon request.
Payment via Paypal only, shipping is free via USPS Priority, shipped only to the Continental US, sold As-Is, no returns unless I grossly misdescribe this eyepiece.
Filed under: Eyepieces & Accessories