I thought for quite some time this factory engraved guitar pots likely said: D.P. but it turns out they must say J.P. This turns out stands for
Jung Poong
which is a South Korea company.
This first photo is from the control cavity of my (likely 1985) Arbor headless Licensed by Steinberger guitar. It’s a not quite that common D500K guitar potentiometer.
The second above pic I found this online after exhausting research:
JP Pots!
Up for sale is a lot of (4) JP Products branded A50k liner taper potentiometers that that is in new old stock condition and most likely from the ’90. These were obtained through SLM and used in Westone, Alvarez and Electra guitars
JP 100K OHM Linear Taper Pot with ON-OFF Turn Switch B100K Potentiometer Mini BK
= Jung Poong B100K OHM
https://picclick.com/JP-100K-OHM-Linear-Taper-Pot-with-ON-OFF-111901433716.html
or here if that link doesn’t work: Ebay
Steinberger guitars were made by cort in that time. In Cort guitars, JP pots were common around 1985.
Hey, thank you for the comment! Always good to know history around the hardware from instruments we love.
I still feel like it could be a MIJ guitar, but of course, it’s likely that it is MIK.