Tacoiardul--I wasn't able to access pictures on my other computer, so my bad. I would say yours is anywhere from 1991-1993. You need to look underneath the chassis (put amp on its front for a better view). There is a small Mesa/Boogie sticker with a serial number below it. There should be the letters FP followed by five digits. While I wouldn't give all five out for safety reasons, post the first three and two x's, and someone here should be able to help you. Silentrage, you have way too many entries to do this oldest of forum jokes. May you be sentenced to three years of "That's What She Said!" following your each and every utterance...