The speaker frames look the same but the magnets are different. I removed the cover from the one that has it.

[IMG]5135372083 fae519ce71
DSCF1548 by IM4VERITAS, on Flickr[/IMG]

From what I have read they are Utah but the uncovered one has a huge magnet and never had a cover nor will it fit, plus it is not tapped for the screw to hold a cover on like the other.

I do have some numbers if it helps....
The covered magnet speaker has 8295 painted on the cover.
Uncovered magnet has 512655-3 and 328531

At least the Altecs are the same.
Any estimates on their value would be appreciated.