Dating fender strat pots
1972: A new eight-digit neck stamp was introduced colored either green or red. From 1972 to around March 1973, this new system was used simultaneously with the previous “XX MMM-YY W”.
Again, either stamp can occur on instruments from this era.
The next number is the production year, in this case 9 = 1969.
On some Telecaster guitars the serial number is found on the bridge plate between the pickup and the saddles.
A example of this is “02033923” found on a Jazz Bass.
From 1972 through about March 1973, this new system was used concurrently with the previous “XX MMM-YY W” format.
Finally, the first one or two digits of the code tells you which model you are holding; 22 being a Stratocaster.
There are some exceptions as you can see in this information provided by Mike Gagliano.