While looking at the machine, tip your head to the right. Just above the needle area seems to be a green shoe. Continuing to the right, is the ankle, a white sport uniform type sock, on up to the right just before the balance wheel is a lovely rounded right angle where the "knee" is, continuing up (down the pillar, really) to the thigh.
I think there is pun or double entendre (spelling) here calling it a "kick foot"...would that be a football or soccer player's leg and foot?