Operation confirmed. I have only checked the battery operation, not with an adapter. Both the pots and jacks are working well without any scratchiness. There is no serial number, but the pot date is 1992. When switching the unit on and off, there is a small "sut" sound, but my other RAT from 1998 has the exact same symptom, so it might be a problem with the switch used. There are some scratches, but there is no noticeable corrosion such as rust on the metal parts like switches and jacks, so I think it can still be used actively. The bonus adapter conversion plug is an unopened TRUETONE 1SPOT that I bought new a while ago. It is a center-positive type that is compatible with the RAT. The rubber feet were torn off and lost, so I attached new rubber feet when listing it, but there were no rubber feet of exactly the same size, and they are about 2mm higher. I have another RAT, but it's not from this era, so I might suddenly cancel the listing because I miss the silver screws and the glossy case. #Proco #Rat #Distortion #EffectsPedal