Hello, just bought this cab. have some question I was hoping to pose to marshall experts. 1) what is the difference between G12T-75 with the all white label (below) and the black and white label? 2) see the blue below? it is blue cloth - looks like what you might use to dry your hands... this can't be stock right? 3) any idea of the value of this cab? The speakers are model "TXXX" so I believe that makes them 1985ish? anything else you can tell me would be great. cheers, mike EDIT: oh, also... planning to replace the wire with hardwire connections but was wondering what I might use to be able to connect/disconnect to the back? I'm not sure about spade clips... seem a bit dodgy to me... what are you using?