Is this old enough to qualify as vintage? The best I can tell it's either an '89 or '91. The serial number starts with "9A", but there is also an "89D" on the placard. This thing is big and loud. About 50 lbs big and 160 watts loud. Makes good noises. Anybody else ever have one of these that can share your glam metal experiences and maybe help out with the date? Also, the tolex looks and feels like asphalt, so what would be a good way to clean it up right? Thanks!