When the toy was wound up it would "walk", swinging its arms and repeatedly ringing a bell mounted on its front.
[1] Packaged as a building kit, the box contained 44 individual pieces along with a plastic wrench.
Once assembled, Mr. Machine was complete with a top hat, bell, swinging arms, and an articulated jaw.
Mr. Machine “walked” forward as his arms and legs moved and his mouth opened and closed as its internal gears turned.
The company reissued it in 1978, but with some alterations: it could no longer be taken apart (owing to the tendency of very young children to put small pieces in their mouths which could be accidentally swallowed or present a choking hazard), and instead of ringing a bell, it now whistled "This Old Man".