Hi Racer,
When I ran PA's back in the 80's in Oz we used to use what we called Roy bins & these look very similar. Differences were the Roy's had 2 x 12's. Used to use double W for the botom end, 2 Roys for the mids & horns on top. Don't know the origin or even why they were called Roys.
Good luck with these.
