Randall RA412JB Cab Question

I've found an excellent deal on 2 of the model number cabs that I mentioned in the subject line. Does anyone here know what materials were used in the construction of this model cab? The thing that I know about them is that the Jaguar speakers were used,... and if voidless baltic birch ply was used as well then I'm going to see to it that I aquire at least one of them. I tried my head through one of them today and it sounded great,.. even at a higher volume. It was tight, responsive and not flubby at all but I just want to make sure that it's built right. :mrgreen: