Sky Optical 10" 4.5 mirror. Focal length of 42.5" Mirror is 1.5" thick. The coating is in excellent condidtion. It is centermarked with red nail polish.
I got this for a prototype truss that was going to build, but it is apparent that I will not have time to do this project.
This should be a great primary for someone considering a scope project.
Price is $150 shipped CONUS
Money order, certified check, paypal accepted.