Looks a lot like most of the elm I have available, and Marc is right. Slippery elm especially varies all over in quality.
Chasing a ring on elm is no harder than osage or locust for sure. The rings are usually thick and well defined, and the difference between the summer and winter rings is obvious by look and texture. It's about the only direction you can cut into elm without it trying to split out a deep gouge. The gouge will usually run out at the next ring (but don't push it..
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Elm does like to heal over lots of tiny surface pin knots, which leaves unexpected lumps. If you chase a ring, you will be exposing little pin-bumps you don't know are there. That can be tricky.
