Purchased new in 1980 and in storage since 1984. This Pyrex elliptical has the original coating and is in excellent condition except for a small chip about 1/8" in diameter on the very edge of the major axis (nearest the primary mirror). There is also an impression in the coating at this end left by the diagonal holder which measures 1/16" in width along the edge.
About half of the chip will be covered by the diagonal holder when mounted. The mirror also has an over coating of Silicon Monoxide.
I'm asking $25.00 for the mirror and this includes shipping in the CONUS.
Thanks for looking,