Help me identify vintage-ish chrome HBs in a '71 Pbass, please

I just picked up a '71 P last night, from a non-musician who inherited the instrument when the original owner passed. It's been in the (perfect) OHSC for 22 years until very recently when he took it out to photograph & advertise it.
"Weird" is the only way I can describe the electronics: two input jacks (both work), one Volume control, a mystery pushbutton switch that does nothing, and these two chrome p'ups with surrounds. I bought this bass as a keeper/player. It's got a killer neck profile and actually still had a great setup, almost in tune, from over two decades ago. I'm thinking I'll probably leave the bridge p'up, get a new pickguard (of course) and a '70s or '80s DiMarzio P p'up to fit the vibe. I'll pull the neck pup out and just cover the chasm with the new pg.

So what am I looking at here? Googling "vintage humbucker chrome bass pickup with hex adjustable poles" took me everywhere but anywhere I needed to be.

 

That was fast, thanks! I just looked up some Model One threads here on TB, and it seems the chrome versions hit the scene around the mid-to-late '70s before the covers started being produced in black in the mid-'80s. My p'ups are *similar* to the Model Ones I'm seeing in photos, but not exact matches. I'll keep looking... maybe mine are way-early versions, or knockoffs?

 

The neck p'up was dead, and the bridge p'up sounded very much like a Ric 4001. Which would be great... if I wanted that trebly, grindy flavor, but this is a P BASS! That's why I'll get a vintage DiMarzio and put it in the factory position (which is currently empty under the chrome cover). I don't think it's a stretch to say I'll have a bass with two phenomenally different voicings. A schizophrenic '71.

I emailed DiMarzio a little while ago and sent pictures and information, and I should hear back in a day or two as to whether these are any versions of Model Ones.

 

UPDATE: word direct from DiMarzio via email reply is "...definitely not ours. Possibly Guild from the same era, based on the mounting configuration?..."

Very cool of them to reply quickly... but now the mystery expands further, as I'm not finding identical Guild p'ups on a Google search. Similar, but different.
Hm.

 

... yes, I thought of that too, about 10 seconds after I plugged into one jack and found the bridge p'up working, so I tried the other jack and it too worked for the bridge p'up. The neck pickup had zero output as it was wired, and I've already got the bass apart now for a full cleaning and refurb. I'll measure both pickups' output when I get my meter back from a friend this weekend, and I'll see if the neck p'up is functional or not.

 

Also, I realized today when I disassembled the neck pickup, the "chrome" pole cover I've been referring to is ... surprise ... plastic!
It was one of those "doh" moments, like when I took the huge handrest cover off a Ric 4003 for the first time, thinking I'd lighten the bass by 6 or 7 ounces of metal.
Then realizing it's a shiny piece of plastic that weighs maybe a half an ounce.

 

Aaaaaaaand AXSTAR and his insight and wisdom for the WIN! Based upon his Carvin logic, I did some Google searching, and came up with information on Carvin "stereo basses" from the '70s. The one in this photo is a '77, from a for-sale page, and has the absolutely identical pickups and surrounds that my P-bass has. Mysteries solved!

I'm guessing the original P owner wanted the tonal varieties of the stereo-capable, phase-reversible, coil-splittable 'buckers and he just ditched the original P pickup & wiring entirely and swapped out some (but not all) of the guts from this model of Carvin. Somewhere along the way, wires got loose or crossed or otherwise and didn't perform as intended or functioned when everything was still in the Carvin bass. I must admit that when I was disassembling the bass yesterday and looked at the pots and harness today, I noticed the soldering looks a lot like old battleship welding.

I've decided on a modern DiMarzio DP122 for the P position, and I'll leave the Carvin bridge p'up. When it's done by next weekend, I'll have a killer "A" neck '71 with a flexible P+HB (HumBucker or Huge Balls) setup that I'm thinking will cover a lot of basses/bases!

Thanks to everyone who checked out this thread and chimed in.