Guess What This Is And Win

This is a drawing of part of something shown in the film "To the Diggers". The first person who guesses what it is by January 1 (12am) will win a signed copy of the film. Listen to the sound track above in this blog for clues. Give as many guesses as you want in the comment box below, or by e-mail to mark (at) horizongate.org. Mark might respond with a clue for further guesses if you beg!