From a comment on my FaceBook post about my C8's serial number. Scroll down, last comment on the post as of 2021-12-07 15:00 EST
"I own (purchased 2nd hand) a "Celestron Pacific" 5.5-inch Schmidt Camera - serial number 007 -- yep, number seven! -- from the days of the predecessor company, Celestron Pacific! It was re-manufactured by a company named "Epic" -- which for about a dozen years bought old Celestron 5.5 and 8" Schmidt Cameras, replaced a few parts - mostly with the film and filter holder unit, cleaned, painted if needed, re-assembled, collimated (not an easy task with a Schmidt Camera) - they came out better than new. I keep thinking I should either run some film thru it, or sell it to a collector."