Looks very close to both the Heathkit and Eico, but no real match.
Came from the estate of a guy who had a lot of Heathkit (Heathkit HR-10B, IG-18, ET-3100), Eico VTVM's, an Allied Knight SpanMaster, all known kit names.
If I never find out what it is, that's okay. A schematic is always nice, but given the tubes used (assuming they are correct), looks like it could be a decent amp.
Thanks to all.
We'll power it up tomorrow and see if she sings.