And what else can you tell me about this amp based on the panels? It's got a '76 serial number. I bought it from an amp tech buddy who thought it might have toggle switches instead or rockers because it's from a transitional period or something like that. He also seemed to think it might've been for the Canadian market, IIRC. Not sure if that's related to the switches or the sticker or even true. I'd like to replace the 50w switch that someone added with a MV maybe. Considering replacing the front and rear panels with ones that have new lettering, or attempting to have them printed on these panels again, but they've got character as-is. Anyhow, your input is appreciated.