I searched high and low for a thread strictly for owners of these early model Two Rock amps but could not find one specific to what I am looking for. I am basically trying to find out exactly what serial number that K & M started out with on their Emerald 50 line. I read an article that was written by Joe in guitar amp magazine that had quite a bit of info about the lineage of the early Two Rock amps, but not specifics on the serial numbers. I was told somewhere that the first EM 50 off the line was # 100 and the article made it sound like the first EM 50, Sapphire 100, and Amethyst Specials were made specifically for Indoor Storm. I bought mine from Indoor Storm in 2000 or 2001 serial #103. Any info or even those of you with EM 50's that want to chime in with your serial #'s would be helpful and appreciated!!