It's probably what we commonly call an old Towa but could be a later 12TE Look a Like.
Any of the numerous brands like Lafayette, SPI, etc. were actually a Towa AT2 or ET1 which all had a 800mm objective.
The first few in this link were Monolux
I'm sure this doesn't help as it's overpriced but here's one from 1956; https://www.ebay.com/itm/205373429671