A few records have had this problem Dan,sometimes the labels are the only problem but a few have had such weird things,mainly the two metal mothers (including the safety copy had been mixed up,and resulted in a few aberrant copies).I don't know how the one in you managed to escape into the outside world(as most mistakes in production are destroyed...)you may have a rare and unique find there.but I cannot be sure of the value of the unit since the uniqueness of your item is rooted in an industrial manufacturing error...it is still a good idea to hold on to it and buy yourself a new copy,just so you can enjoy the song" knife edge" great to have two sides worth of "lucky man" though Dan.....