Dating guitars by pot codes

26 Mar

This means that if you don’t have a basic ballpark of the period an instrument was made prior to the 1960’s then Pot codes won’t really help you.For example, the Pot codes you can make out are: 1377415.So, in this case, '340' means the 34th week of 1960 - somewhere towards the end of August.Interestingly, the other pot is dated '370', which at three weeks later, is mid-September 1960.

Six digits were changed to seven starting in the 1960’s making the year two digits instead of only one.

The EIA assigns each manufacturer a three-digit code (there are some with one, two or four digits).

When dating an instrument by the ‘pot code,’ keep two things in mind: The potentiometers must be original to the piece (new solder, or a date code that is off by ten or more years is a good giveaway to spot replacement pots); and the pot code only indicates when the potentiometer was manufactured!

If the code does not fit the above criteria, don’t force it and skew your dating results.

Note: The numbers below are for Hylight and Biacrown Hiwatt amplifiers only!