Heft... i think its like Torque... and i think Peak with the SI unit of ooomph.
So 'x' amount of 'Heft Ooomphs Peak'... (HOP)
I seem to remember reading it in a Trace Elliot Brochure back in the 80's...
Certainly looks that way... 2x caps and a resister in the sleeve...
https://www.bestbassgear.com/ebass/gear/electronics/greasebucket-circuit-removal-mod-for-fender-american-special-jazz-bass.html
Any one in or near Southampton?
P Body (PJ) and Tele Head Neck... 'kin steal @ £60!.. Too far for me...
https://www.gumtree.com/p/guitar-instrument/bass-guitar-project-/1441665040