Hard to get a feel for scale here. That horn looks just like the Mach One midrange. Panasonic did make some quality speakers with real horn drivers back in the day, like the SB-400:
And the SB-660:
And several more. So they MAY be junk if they are little and light, but don't write off Panasonic. They did make some beefy stuff. If it's a CL ad or something, ask for a model number or dimensions.