This is a 8" X 1-3/8" 60"fl plate mirror with a problem. This was an amateur project and the maker never finished polishing before having it aluminized, so the outer 3/4" - 1" are hazy. I got it in trade a few years ago with the idea that it would be a good way to get back into pushing glass, but I've since determined that my days as an ATMer are long past. If you're looking to build a longer focal length 8" planetary scope, here's a blank with most of the grunt work done; just go back to polishing or fine grinding. Included is an 8" aluminum mirror cell for 9-3/4" (approx.) inside diameter tube. The cell could use new cork pads, the ones on it are very hard.
$25.00 plus shipping