Hand cranked german air raid siren

Original ww2 german bakelite metal hand crank air raid siren by JURK, dated 1940.purchased this some years back from IMA-USA for personal collection.was debating in my mind as to listing this but here it is for sale.stiil works extremly well and you can adjust the pitch .to me looks as if could have been attached to motorcycle or even push bike.not cheap.