The inside looks pretty stock except for two blue caps on the high level board and the heater caps/diodes. The back and cover look stock. The front face has different knobs. All changes could have been revisions during repair sessions. The big difference is the face plate! At first glance it just looks like the later version gold anodized type. However it does not have the top and bottom lip bevels. A flat face plate. I have not seen that before. The after market vendors selling face plates seem to all have the bevels.
Has anyone any real info on this? Particularly if it is actually from Dynaco. Maybe a prototype between the brass/brown and the later gold anodized beveled versions. Maybe the knobs were a prototype as well. Your insight and comments are appreciated.