Well, it looks like a mirror with "Cave Optics" scratched on it. Now, I'm not saying it is not a Cave mirror, just that Coulter or whomever could have scratched 'Cave Optics' on it to keep track of where they were sending it or Cave to 'claim' it or some such. What do we have in the archives re: Cave Making Cass Mirrors? Pix or Video would help - "No film, no case"
So, I went to the Cave-Astrola site and to me it seems they were perfectly capable, skill-wise, of making those Cass mirrors. It said they offered some Casses, but no mfr'ing details where I read. It also said Cave Sr. inscribed the backs of mirrors with Cave Optics with OE lettering, but then he was gone (I think) before the Casses were offered.
I believe I would vote "Cave made that mirror." If someone else had, they would have left their mark, or you'd see where something had been removed. We do not see that, yes?
Edited by AstroKerr, 01 September 2020 - 07:57 PM.