Simple and Super Satisfying Handmade Turkey Call

I picked this up because it looked at first like a slide top box that might hold something interesting inside, but then I realized it was a clean and simple homemade turkey call, which, for me, is pure delight! I've included a short video, as it is the sound that is really the thing, but I've got to say there is something super satisfying about the very simple method by which one produces it! I think perhaps the perfect thing for summoning people to the Thanksgiving table!

5 3/8 l x 2" t x 1 13/16" w.  Good condition, structurally very sturdy and sound, with a small chip to one top corner.