This is a Keystone pull toy likely from the late 1940’s. It measures 12″ long by 12″ high. When it is pulled the dog moves side to side and his arms raise and lower to play the piano. It is made of Tekwood with a solid wood base and piano legs. The keys on the piano are made of paper that is glued down as a result are rather fragile. This example has about 85% of the keys remaining. 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.
For my private collection.