Dating stratocaster pots
The next digit denotes the year, in this case 9 = 1969.The next one or two digits denote the month, in this case 11 = November.
After March 1973, Fender dropped the old style date stamp and continued to use the new style, 8-digit code until sometime in 1980 when small adhesive labels bearing Month-Day-Year date stamps appeared in the neck pocket, pickup cavity and/or back of the neck.
An example of this is 02033923 found on a Jazz Bass.
From 1972 through about March 1973, this new system was used concurrently with the old Month-Year date stamp.
For Stratocasters it is 22 and for Precision Basses it is 5.
The other three digits (320) are a mystery and perhaps are some kind of batch or lot number. Here’s our P-Bass again (s/n 277983) with the code 529129B.
Search for dating stratocaster pots:
CBS-Fender used this neck code system concurrently with the standard Month-Year date stamp that had been in use since 1962.