I believe these are just the early model of the A-25. The cabinets should have the same dimensions the commonly known A-25, but early runs of the speaker had the port above the tweeter, instead of below the woofer, as is more commonly seen.
I'm glad to see the plastic grate over the port - I had a pair of these, and I thought the plastic was a cheap replacement for what was originally there - but, apparently that's just the way they were made then.