The three planks were offcuts bringing the big piece down from 18 inches wide to 12 inches wide, Tom. I got most of the beetle holes cut off the designated top, too. The last one should go away with the edge chamfering, but failing that, I’ll hide it on the back.
It was a tree (looks to have been 20+ inches in diameter) about ten years ago, Splint. Seems dry enough, even though it was stored in a pole-barn in MN for most of that time.