Weird. I think these must have been some home-modded A25 variant, or perhaps some sort of prototype. I have never seen a Dynaco speaker with a cone tweeter or a conventional reflex port (or is that a tweeter, which would make it a 3-way- equally unusual.) The driver layout vaguely resembles a very early A25, minus the aperiodic port, and from the back looks stock, but the woofer mounting screws are obviously asymmetrical, and the (tweeter?) mounting is crooked.
Dunno if the co. that bought the Dyna name ever made speakers, but this one looks older than that at any rate. A mystery...