Ampeg amp serial number dating
These current serial numbers are arranged in a letter-ten digits-letter format (A-xxxx-xx-xxxx-A).
These are still found on stickers with a bar code on the back of the amp.
The first Marshall amps were made in England starting in 1962.
If you have absolutely no idea whether your Marshall is old or new, a good place to start is the model name or series.
From January 1965 to June 1969, model codes were used but no known serial numbers accompanied them.
This era saw the advent of Plexiglas panels (giving rise to the "Plexi" name) and four-digit model numbers.
The letter B was skipped, as were the letters I, O and Q since they might be confused for numbers.
Use the model codes and date codes below to determine the model and age of your amp.