They were originally developed, as a Goose call.
Miss Delta and Flyway, and the upper Chesapeake Bay area's, were the testing grounds.
Waterfowl hunters found the versatility in the call, and it found it's way into Turkey hunting as well.
As time progressed, as the Goose Flute's, so died the Tube for Goose, It found a lifelong home, in the hands of Turkey Hunter's.