This is a Jason Voorhees bust made by John Carl Buechler's MMI shop, previously owned by Planet Hollywood. The entire head piece and teeth are movie mold, and the foam latex head piece itself was worn by Kane Hodder during promotional appearances for Friday the 13th Part 7 in 1988, including the famous People Magazine photo shoot--the only time all of the major 80s slashers (Jason, Freddy, Michael, Leatherface) were united in a single photo. The body was constructed later.
See http://jasonlivessince1980.blogspot.com/2020/02/the-part-7-makeup-test-bust-forensic.html
