Clockwork Heart

Rather original title, isn't it .
I recently saw a movie about the Prague astronomical clock, and with the strange movements of my mind, I came to conclusion I have to try making some clockwork thingy. So here it is .
The heart is made of black and silver polymer clay (the silver gives the black nice antracit shine), some parts of old watches and brass and silver wire. About 2,5 x 2,5 cm/1"x1" (on the second photo, I added the prague groschen coin for scale).