Dimarzio's?

Yes, DiMarzio uses the screw-in poles:



DiMarzio Patent Number PAF Pickup 1970s P Bass Pickups - Precision

be careful taking the cover off, it's easy to damage the coils

 

Depending on the age and manufacturer, some type of DiMarzio copies were fairly common with the Japanese factories.

 

I think Dimarzio were the OEM for those pickups. I had the same pickups in a Westone Thunder bass. In theory they are just Model P pickups, though I found that mine were unpotted and pretty microphonic.

Dimarzio made pickups for the Japanese builders for a while; things like a Super Distortion without the 4-wire hookup (technically more like a Super 2, but with slugs instead of hex poles), which show up in Hondo guitars.

Japan being Japan, I wouldn't be surprised if the Dimarzio designs were all cloned at some point. A lot of those Matsumoku instruments have cream pickups!

 

Could be an Ibanez Super P4.

 

DiMarzio did OEM pickups for Matosmoku guitars, so at least some Aria Pro II and Westone guitars and basses have them. The allen (hex screw) polepieces are one identifier, as are "double cream" pickup bobbins, which are in fact a registered trademark for DiMarzio.

 

Dimarzio model P's (what those look like from the top) have different magnets - ceramic magnets that go all the way to the edges of the flatwork. Those, if they're Dimarzio's, are an OEM version that wasn't offered to the public. I suspect they're someone else's copies.

 

Not standard DiMarzio pickups. Like mentioned above could be DiMarzio oem but likely copies.

 

Didn't Schaller make pickups that looked a lot like DiMarzios from the top as well?