For use with Refracting and Maksutov Telescopes -
Complete with (2) Dust Caps, a Machined Set Screw
and Chromed Barrel.
Get more light transmission with a first surface mirror !
Described as an Economy Diagonal in the U.S. Dealer 
Price List, Obsoleted over 20 years ago when Celestron
no longer offered these (.965") format accessories.

Note :
The Company Did Not Have a Logo on the Economy
Series of Oculars, Barlows and Star Diagonals.

Hundreds of other Unique - Rare - Astronomical Equipment
and Optics await !  
Request posting catalog item(s) for eBay purchase,
Bundling is Possible for Domestic Orders.
Specialists in Vintage (.965") Accessories, Checkout the entire 
Inventory Online, Search for : 
astroptx

Only Quality Astronomical Filters for the Serious Observer:
Why use a $1 Filter with your Fine Oculars !
.965" - 1.25" - 2" (48mm) +
Celestron - Meade - Bausch & Lomb (Japan) 
Tiffen (USA)  HR Glass, Stackable in Metal Cells.
Many are Now Posted !