This is one of two versions of the dog playing piano. it measures 10″ long by 12″ high. It has a music box underneath and the arms articulate when the wheels move. The base, wheels and piano are solid wood. The dog is made of laminated Tekwood. Currently think these are late 1940’s. There is a music box below that would play when in motion. These pull toys music boxes never seem to work so I do not know what the song is.
From my private collection.