I believe someone did this to remove the model from the cardboard. It can be repaired but would probably need to use hot glue, or something similar. The top plug in header with Monogram logo seems more aged than the display itself. It must have been stored separatly from the base display. Last, this type of display usually had a clear acetate cover on the front.
It was never installed on this display as the adhesive strips on the sides, to hold the acetate, has not been used. Overall, this display is in excellent condition. I don't think too many of these large displays survived. Dimensions are: 36"w x 17.5"d x 19h (with plugin).
I try to give an honest description of items in words and pictures. Please check my other auctions for more Models. Auctiva offers Free Image Hosting and Editing. The item "Monogram USAAF Boeing B-29 1/48 Factory Built Store Display 1970s" is in sale since Sunday, July 28, 2019.
This item is in the category "Toys & Hobbies\Models & Kits\Military\Aircraft\Airplanes". The seller is "sevans" and is located in Carmel, Indiana. This item can be shipped to United States.