I promise the tables will still be there after you finish reading.
Okay, I know you’re all just dying to skip ahead to the serial number tables but try to contain your excitement and read through the article first.
The serial numbers for these amps begin with “LO,” indicating that they were made in the Fender/Sunn Lake Oswego factory. It usually applies to old vacuum tubes/valves that have gone unsold for decades. All cream board tweed Blues Juniors have a “Limited Edition” plaque on the back.
Black and White wires terminated in 1/4 inch push on terminals.
Green wire terminated in screw terminal for ground connection to chassis.
The cream-colored board is laid out entirely differently (and better) than the green board. But the old ones sound darker, while the new ones are brighter, with more emphasis on treble tones.
One is not necessarily better than the other; the dark tones are nice for blues and jazz, while the new amps do brighter tones better.