Can anyone shed a little light on this. I have a pot call that has Graham's Mountainside Turkey Calls on it. It is fashioned after D.D. Adams' calls. It is acrylic or sand blasted glass on one side and the back is open, like D.D's with a slate inside. The signature on it is Dave Butz. I checked on this company. Manta says it was started in 1988 by Sally Graham, or she is the owner now. Any history on these calls and Butz would be appreciated.