Fender Vibro Champ Amp from 1969. I’m sure true aficianados can chime in but I believe this style/era with the aluminum trim that goes around the grill cloth started in 1967 and ended sometime in 1969.
This amp was biased so hot in the stock setting that it unfortunately had a lot of distortion and didn’t really have much clean volume. After adjusting the cathode resistor it sounded much better.
This is the cathode bypass cap and cathode resistor for the 6V6. 470 ohm resistor looks a little darkened from heat stress and measures 517 ohms.
The serial number on the cap date it to 1969. 235-6907KB. 235 (Mallory manufacturing number) 6907 (07th week of 1969)
Fender Vibro Champ Amp AA764 schematic
Fender Vibro Champ Amp AA764 layout