These speakers - or at least the mid/tweeter part - seems to be some sort of DIY electrostatic speaker.
More like a brand not far removed from the garage.
Caps date it to late 60s/70s.
Quite a few ESL + woofer. Qw hd B&W DM602 in the shop and much later i ran across some Jantzens.
There were many European consoles in the tube software tube voltages thaty uses SE ESL tweeters.
dave