VINTAGE MECHANICAL TINPLATE CHICKEN IN EGG TOY CIRCA 1940
The mechanics are made of metal strips, cog-wheels and a coiled spring. Very simple, but effective and works by holding it with the thumb pressing against the end of the plunger and the next two fingers holding it behind the first plate. The ratchet plunger is pressed in firmly and quickly with the thumb which sets everything in motion for the tinplate circular blue disc and overlapping yellow flower petals to revolve and open, disclosing a little yellow chick inside.
Simple, but very effective and addictive. Tried to do a quick video clip but can't upload that at present. Suffice to say that the blurred shot is everything whizzing around exposing the chick!