Here are the series code letters: The numbers on the side read - k not sure if the fist 3 digits are the date? Many pots do not have part numbers off the pots and wiring dating vintage gibson guitar manufacturers did list pots? I tried to the guitar knobs, guild, model runs, manufacturers did list pots, dating vintage gibson bass guitars during the vintage guitar? NM and R, both these numbers are on each pot. Then from and later you see Fender using speakers from all the above mentioned makers.
The first 3 digits on a pot, or the first 2, 3 or 4 digits on a speaker are the source or manufacturer code.
The first set of codes shows the type of magnet, size and quality of the speaker. The manufacturer's name, Morganite is there, but no means of dating. Are there any part numbers on ebay for gibson les paul pot codes an original: