the newer pickups are 12k and the older high gain 11k, the really old pre 90s are 7.8k. there a big diffrence with the two newer pickups and they the ones to go for.
get that Lemmy (Motorhead) type heavy sound!
Epiphone EB3, Yamaha RBX 170. LE.Marquis.NY,
Harper 5 sting fretless, Rockenbetter 4003.