Huh, very cool! Nobody in the family could remember where mine actually came from. Nobody else knew enough about electronics to be impressed by how old it is, either. Actually I’m lucky it came up.

There’s no markings I can see. If Alladin had a patent on it maybe that would be the place to start looking for the model.

There’s no mechanical relay I can hear and no tube warmup period, but on the other hand it has no boot period and it does behave oddly depending on the quality of mains power (so analog). The person who almost certainly bought it died in the 1970’s.