I'm not really sure what I've got here. It looks to be a bracket for an eyepiece projection screen. And from the color of the paint maybe Edmund? I had an old Edmund reflector that I gave away 5 or 6 years ago and this could have been part of that. Forgotten and neglected like Buzz Lightyear all this time. Feel free to enlighten me oh Obi Wan.
In any case.
If you recognize it and need it to trick out your classic whatever, shoot me a PM and it will be yours for the posta
I have one for my Edmund reflector but it's black. It's to attach an arm and camera bracket. Also for supporting a white plate for projecting an image of the sun.