Antique 1920-30s Child's Folding-Scrolling Blackboard/Chalkboard/Easel in Meridian, Idaho For Sale

Antique xxxx-30s Child's Folding Blackboard/Chalkboard/Easel/Desk with ability for scrolling illustrations. Chalkboard folds down to create a desk. It folds flat for storage.
I believe this is Richmond School Furniture, Muncie, Indiana, Litho Plate Slated Blackboard / Educational Blackboard. I have seen a couple others on Ebay that look similar, but because of the way this one is constructed, I believe it is much older. The earliest I have seen is xxxx and I would guess this one late xxxx's early xxxx's.
Dimensions are 19.5" wide X 39.5" tall.
This would also make a great menu/greeting/message board.
I haven't cleaned it or tried to refurbish it. It is original from what I can tell.