This is an adapter I purchased years ago
for my Celestron C102 doublet refractor.
It is also known as a 2" visual back.
I think it it is also known as
"Lumicon 2" Accessory Adapter for Celestron Classic Refractor"
Lumicom shows this as LVP-AD065 $39.95
This is NOT the same as the one for Celestron Fluorite.
It has 2 set screws.
It is used in excellent condition.
I'm after $35/ppd or best offer.
Thank you for allowing me to avail myself of additional