-Frank ZAPPA / Mothers of Invention:20 Years Of Frank Zappa, ULTRAMEGARARE! USA 1991 Extremely Ltd issue live 12LP GREY vinyl Box set on Mud Shark lbl, this is the extremely Ltd GREY vinyl issue, not more than 100 copies pressed in 1991, probably less, all vinyls are housed in deluxe box set, complete with booklet & still complete with sticker originally attacched on the shrink!!!This is the f