That are not shown in photos. I do believe the only piece missing would be the mirror image to the top of case shown in first photo that goes to the bottom of the top piece, (missing the brass trim also unfortunately) and missing pieces of curved wood. I could text a simple sketch of what it is supossed to be.
Had each side built up cases on top. Very usable as is and still good for a base. Aphrodite's Antique & Gifts. The item "Art Deco 10' Store Display Cabinet Case Mahogany Brass Trimmed Oak Back" is in sale since Thursday, March 21, 2019. This item is in the category "Antiques\Furniture\Cabinets & Cupboards\Unspecified, Unknown Date". The seller is "aphroditesantiques" and is located in Highland, New York. This item can't be shipped, the buyer must pick up the item.