Utah 12 inch dual concentric & coaxial?

[Uhills]

Can anyone help me ID these speakers? I pulled them out of a custom built console (pic attached). They are early 70's 12 inch dual concentric with a coaxial tweeter horn. Inverted cloth surrounds, cast aluminum(I think) baskets, alnico magnets on the woofer and tweeter.
I haven't been able to find much info online.

Anyone?

Thoughts?

 

[pathdoc2]

They appear to be in incredibly good shape considering their age. I had an old Utah speaker in a guitar amp my father built in the late 60's/early 70's. It wasn't a coaxial and I never cared for its sound.