It's a smaller species of Elm native to Ireland, Scotland and England. Dutch Elm disease has started taking them down pretty quickly and the people who are cutting it are hoarding it waiting for the price to skyrocket once they're all gone.
There are two theories on the name - wych means pliable or bendable so it was more bendable than regular elm. It was also used in the bottom of butter churns to keep the churn from being hexed.
Liking the Watco better than the BLO as it builds faster and has more body.
This is my first Navigator so I can't speak to the wear aspect.