Appears to be a variant of a spring drum: https://m.youtube.com/results?search_query=Spring+drum https://m.youtube.com/results?search_query=Spring+drum Enable

Appears to be a variant of a spring drum: https://m.youtube.com/results?search_query=Spring+drum https://m.youtube.com/results?search_query=Spring+drum Enable to find an example, but seen another variant where the spring is suspended in the center of a hollow tube with caps on the ends and hole on the side for sound to escape.