I actually own that exact model.
Bought it at Daddy's Junky Music (If anyone's ever heard of it) in Rochester, NY, when it was still open. The cab, at that point, had certainly seen better days - Speakers were wired incorrectly, one was blown, and one was a replacement.
The speakers were in terrible condition, in my case, but i only paid $100 for it.
After I cleaned it up, I threw new tolex on and ordered 4 new speakers from Celestion (BL10-200Xs to be exact). It sounds great now - I might even say one of the best cabs I've ever heard. Only the back panel is particle board, the rest is solid wood grooved together in the old-school style. Extremely well-made and ported in the middle.
Originally rated for 400Watt in the old model, with the new speakers, mine is an 800Watt cabinet now.
Lance Rocket - right on with the specific details!