The possibilities are almost endless. Here is a rather unusual combination (at least the power tubes). Sounds nice.
The power tubes are 1.3A EL6 tubes. They use side contacts and are similar to the EL12 tubes which have a German Steel base. This is a hot running tube and the large heaters glow red hot at 100C.
They were made by Tungsram:
After looking carefully I found an almost invisible date code GT which is November 1946 - wonder if they are made by British Tungsram (as opposed to Hungarian Tungsram).
The drivers are 1950's 6SN7GTB NEC tubes from Japan relabeled Channel Master.
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