This hand tuned PP167 Acme triple tone whistle produces a three tone chord just like the whistle on an old American steam train.
Its low pitch is generated by brass organ style pipes, the longest of which is 32cm long. Click here
to hear a recording of the whistle.
Like almost all modern whistles, its design was patented by Acme of Birmingham, the famous rags to riches company formed in the 1860s by Joseph Hudson.