Any ideas on when these amps were made? One has serial # 024264 and other is 49820. Conrad, help me, I'm hung up on this...both amps have the same pots(1347226, 1347230) which research says were made in ' 72; The first amp has knobs with screws, the second are push-on; the first has a black chassis, second bare metal(aluminum?). I know it's not that important-obviously no earlier than '72, but I am curious. Thanks for letting me vent..........
