It looks as if a previous owner had a lot of items placed on top that left rings. All of this is considered in the price. The case measures 29.5" wide x 30.5" tall x 17 deep and has one shelf that can be removed or placed higher up on the additional 4 shelf pegs.
I don't believe the shelf is original, but it may be. It was my intention to replace it and add a second shelf, but I've since changed my plans. The item "Late 1800s Early 1900s Nauman Oak Countertop Display Case Showcase General Store" is in sale since Friday, October 23, 2020. This item is in the category "Antiques\Mercantile, Trades & Factories\Display Cases". The seller is "jminnichdesign" and is located in Portland, Oregon. This item can't be shipped, the buyer must pick up the item.