Thanks so much for your reply! The panel on mine matches the 3rd image on your link! The part that still confuses me is that the schematic for the EA-35 (and 35T) show 5 tubes. http://www.el34world.com/charts/Schematics/files/epiphone/EPIPHONE_EA-35.pdf
But that is definitely my amp. I don't think the speaker was ever replaced and it is identical to the one on this ad http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=111175664071&fromMakeTrack=true&ssPageName=VIP:watchlink:top:en But my knobs are different.
I was hoping the serial number would help, but for now, I will rely on the "Gibsonette" schematic.
Thanks again for that link!