I just received 2 slate calls from this new company that's located in Louisville, Kentucky. The first is a slate/slate in mahogany and the second is slate/glass also in mahogany. The striker is "old growth" maple and is a real beauty.
You can read more about this company at http://derbycitycalls.com/
I have been "playing them" for the last couple of days and am really impressed with the sound, especially when using that striker.
I plan to take them to the woods this weekend for the opening of the fall turkey season here in Southern Illinois. I'll let you know how they work for me.