I was at the vintage guitar show near Phila. PA this weekend and picked up a used 15" Bag End Cabinet for $150. Needless to say I couldn't resist. I've noticed the newer models have the model number on the rear plate. But the rear plate on this cab (not a deep red model) doesn't have any info. The cabinet is built like a tank, lots of insulation inside and a huge rear port and the speaker is BagEnd. Anybody have any info on the older cabs that can help me identify it? I do have a serial number but no spec info.