Primitive Adjustable Wooden Tray

This primitive wooden tray has is 15" x 7.5" and about an inch deep. It has little slots on all of the inside pieces that allows them to be adjusted to some extent. I have shown it in both cool and warm light. The actual color is somewhere inbetween however I think it is closer to the photos that show it on the wood floor. I origionally thought it was a printers tray but there are no markings, hooks or handles on it. I don't know exactally how old it is, however, my grandparents did have it as long as I can remember and I am retired. It is in nice shape for it's age, see the photos for exact condition. One of the shorter cross beams does seem to be a bit too short and will tend to fall out. If you know what this was used for or any other information about it please let me know. I am pricing it on the high side until I know what it is or more about it. If you like it then you will be notified when I lower the price. Thanks for looking.