MICHAEL JACKSON Thriller (Extremely rare 1983 US ultra-high-grade methyl cellulose metal based lacquer reference double sided test pressing acetate for a 7" cut into a 45RPM 10" disc featuring two versions of the song, with and without effects. Released as the seventh and final single from Michael's sixth solo album, Thriller, on the 23rd January 1984. This disc has Allen Zentz Recording studio labels, custom typed with artist name, title details and dated '6-20-83', with a plain die-cut sleeve. This would have been pressed in very small numbers before the finished article, intended for sonic review & not commercial resale. The disc remains in nice condition with just faint signs of cosmetic wear only natural with acetates. Very tough to find)