Help make a quacking noise in a wooden toy duck (mechanically, not electronically)
I'm only working from a few images I've found online, however; I don't have an actual one to examine.
On the originals, the axles operated a couple of mechanisms: the duck head pivots to open and close the beak, and there's a mechanism under the base (I'm assuming) that makes a quacking noise.
I've got a pretty good idea how to create a simple cam for the head/beak movement, but I'm not sure how to generate a quacking noise mechanically. My online searches have proved fruitless.
Does anyone happen to have one of these vintage LEGO ducks and is willing to snap and share some photos of the mechanisms?
Or, does anyone have any good ideas how to make a quacking noise mechanically? My thoughts are a push/pull rod-type crank attached to an axle, but on the other end of the rod . . . not sure.