Elaborate and outstanding device. I made a simple version of this a few years ago. Often sits on the mother work bench. Brings things closer to these old eyes. Dog holes can and do often hold a magnifying lighted viewer. 2 layers of MDF with an oak edging and legs. No built in vise but do have a clamp on one. Usually just use clamps across the width.
LBD, like yours a lot. Nicely done. More elaborate than mine.