Hi @Heydayday - welcome to BC!
It's important to remember the huge majority of headstock names on these instruments have nothing at all to do with the factories that made them - your bass looks like it's probably from a different manufacturer - and possibly a different country - from the Johnny Guitar in the link.
Headstock names would be applied by the manufacturer if a customer requested one and provided a logo design - it looks like Johnny Guitar (& later, Johnny Pro II) were probably names owned by a European retailer or distributor (possibly German or Dutch), who would have ordered & imported batches of these instruments.
If a customer didn't request a brand then headstocks would be blank and the wholesale price lower, which is why there are so many 'no name' guitars & basses from the 70s & 80s era around. Sometimes, like both unbranded basses in the first post, it's possible to work out the manufacturers from build quirks & details, but sometimes they can be annoyingly hard to ID!
The DiMarzio Model J on yours is a bonus - the PAF-stickered, silver pole early examples are increasingly rare, and that bassbucker's interesting. Both Schaller & DiMarzio made similar pickups, but those both had hex pole pieces rather than the slotted ones on yours. Not sure what that is.