Posted by John W. Siple (63.164.145.198) on August 03, 2003 at 15:22:29:
I have a 1960's vintage 12.5" f/5.6 full-thickness mirror that is marked Keim Precision Optical Co. and Coast Instrument Co. on the back. It is an unused mirror in the original box. I am familiar with Coast Instrument Co. but would like to hear more about Keim mirrors. I understand that they were a competitor of Cave Optical Co. in the 1960's and produced some of the best mirrors. A history of the company (Keim)? Any comments from users of these mirrors?