The tweeters look like upside down peerless, but then I've seen that a couple of times and I'm not sure what that really means.
The cabinets remind me of my Monitor 12 series 2 speakers, so I'm thinking the tweets could be SL2500's in that peerless housing or something. I'm confused.
The seller lists the info from this site, which only has info on the later Monitor series. Which reminds me, I wish this site had a more thorough database of information on it's vintage speakers. I'm sure it would if it wasn't a major hassle, I'm just saying that I wish it did for selfish reasons.
I'm not sure about these 7's, but they're a stone's throw away from me.