I am the owner of the speakers and, after a few failed attempts at selling them on ebay (got decent offers, but many -including the highest- involved transportation, and that's something i was unwilling to do), I decided to post on a few FB groups.
As it turns out, one of those internet-type walking encyclopedias is of the opinion that these are one of PWK's designs that predates the Cornwalls: "Paul used University drivers at one point - which these mids are - but that was in the pre cornwall era. Nice execution. Refoam the eminence woofers and enjoy". Proto Cornwalls, if you wish. This was his guess at the driver complement: "EVT35, University H600 mid, Woofer looks to be CTS/Eminence"
The H600 term in particular rung a bell. So I went digging through my phone pics and discovered an old close-up of the mid I had taken at one point. Sure enough, these are H600 mids! Happy to provide a (very blurry) picture of the mid if I can figure out how to attach pictures to posts as a guest.
In any case, given the interesting new finding, I think I'll be holding on to these for a little while.
