The large Thunderer whistle from Acme is made from solid brass and is a pea whistle. It has high power and a medium pitch 115dBA. It is a big whistle with a deep tone and a tapered mouthpiece.
The large Thunderer whistle from Acme is made from solid brass and is a pea whistle. It has high power and a medium pitch 115dBA. It is a big whistle with a deep tone and a tapered mouthpiece.