The Brain That Wouldn’t Die (1962)

This piece is a combination of two kits, both from Dimensional Design. The closet monster has escaped, ripped off the scientist’s arm, and is ready to go for more.

Kit Maker: Dimensional Design

From Wikipedia:

The Brain That Wouldn’t Die, also known as The Head That Wouldn’t Die, is a 1959 science-fiction/horror film directed by Joseph Green and written by Green and Rex Carlton.[1] The film was completed in 1959 under the title “The Black Door”, but was not released until May 3, 1962, when it was renamed. The main plot focuses upon a mad scientist who develops a means to keep human body parts alive. When he unexpectedly must use his discovery on someone close to him, events do not go as planned.