Not to deflate this too much, but the "gold transformer" probably has gold plated end bells. Those were used by Jack Eliano in years past, more or less in response to Mike's use of polished brass bell ends. Probably only George would have known what the cryptic serial numbers meant. Ironically before George started Wright Sound he would spend his idle time at his old job drawing up schematics of ideas he had and gave some of them to me for VALVE, but when he went into his own business he didn't seem to document much of anything he actually built and sold. A thorough search of his home after he passed away turned up zero documentation.