Star Trek TMP 1978 Handmade Artwork ANTI-GRAV UNIT #2 Probert prop COA. About 31 cm x 23 cm. Star Trek 1979 THE MOTION PICTURE: rare and important, one of a kind, handmade Artwork about the ANTI-GRAV UNIT. This handmade artwork, one of a kind, was realized by Andrew Probert in person. Search for : memory-alpha …