Prop design for the movie Hellboy (2004): The Heart of Kroenen.

Here is the final artwork and second version of Kroenen's heart. A design more complex in its operation than it could be finally made, since its pieces were designed to rotate in opposite directions passing through each other.
Hellboy movie (2004)

This is the first version of the Kroenen key or heart that I made. A very mechanized version that did not satisfy me because of its lack of originality.
Hellboy movie (2004)