Playing the game Railroader recently, I cam across a mod you can download for the game that can bring in new/better whistles to use. One of them I saw was listed as "United States Potash Co. Boilertube 6 chime". I know of boiler tube/Casey Jones whistles, but I've never heard of such a whistle before. Was/is there such a whistle? If there was/is, does anyone have audio of it in use?

I'm pretty sure I'm correct, but I want to make sure. Can anyone confirm if this is a Canadian Pacific 5 chime whistle being used in this video? If it isn't, can you please tell me what it is?

https://www.youtube.com/watch?v=ActIkLSW20Y