Hi again everyone, ever since I first watched the Polar Express movie, I always wondered what type of whistle that Pere Marquette 1225 was using when they recorded it for the movie. I always thought it sounded great, but I could never just quite put my finger on it. So, does anyone know what type of whistle that Pere Marquette 1225 was using when they recorded it for the Polar Express movie? Any and all answers would be greatly appreciated! Thanks!