
1967 YGM-2 (no reverb) and a 1972 YGM-3
Great amps, both stock except for the rubbish speakers (I put some old British Celestions in them both: a greenback and a C90). But, you say you can't solder? You know you can (literally) kill yourself messing about inside a tube amp if you don't know what you're doing right? I'd be careful...
I took my YGM2 to a tech to fit a proper 3-prong power cord, and while he was in there he messed with the bright cap without being asked to and totally fucked up the sound -- made it all muddy and sludgy. So I took it to my regular guy and he returned it to stock. Sounds great to me.
What format is your serial #? We can date it from that.
Four-digit serial numbers
1966 0XXX
1967 1XXX
1968 2XXX
1969 3XXX
1970 4XXX
1971 5XXX
Seven-digit serial numbers
irst digit: Last digit of year of production (1 ^= 1971, 3 ^= 1973)
Second and third digit: Month of production (01 ^= Jan., 11^=Nov.)
Last four digits: Numbered unit produced within that year?

