Acme

The Acme 210.5 dog whistle is a high pitch whistle, without a pea.  This essential dog training aid produces a solid, single frequency tone. 

The Acme 211.5 dog whistle is a standard high pitch whistle without a pea.  This essential dog training aid produces a solid tone at a single frequency.  T

By squeezing with the teeth during blowing it will produce the call of young and old crows.

210.5 has a high pitch without cork

Acme predator warbler also known as a widgeon whistle. A blow and suck whistle that makes the quiet sounds of a bird or injured small animal. Used for very close work.

Soft gentle blow,dying down will produce the familiar "coo-oo"

produces good mallard, teal and widgeon calls, excellent quack.

Acme Whistle 211.5 Standard pitch without cork    

210 has a high pitch with cork