Dating fender pot codes
Often the manufacturer of the potentiometers may put a part number for the company making instruments so they can better identify the particular part for a certain specification.
If all the parts had no spec information you wouldn’t be able to determine which pot was a 250k Audio from a 100K Audio.
(.00 additional at that time) Always pull on the volume controls to see if they pull out-these were pull boosts, not labeled on 70’s faceplates.
This is information from the Engineering and Publications department.
Eyvette Bottoms at the EIA office said that there are now four (4) numbers that can be used for the Source Code and there may or not be a hyphen (-) used between the companies Source Code and Date Code.
Fender used two kinds of silver/blue grill cloth, first version, as with your amp, the blue stripe fades away to red, then brown and eventually disappears.You would then get a different Source Code and Date used on the same instrument.On potentiometers you may have other numbers besides the Source and Date Codes.This directory contains USENET articles Mic has saved about guitars, equipment, pickup, techniques, players, and so on.
Mic has graciously granted permission to post the stuff on the JT30 page on the off chance that it might be useful in the context of Blues Harmonica.The last version had a super bright neon blue which held its tint.