Wow! Antique-shop.com forums are in the big #1 spot on Google for the search term "antique shop forum", for 4 years running!Thanks to YOU.
Well,, unless I am way off this display cabinet/bookcase is likely made by National Bookcase and with the style number and likely date showing in one pic !! 1955 style number to the left of that,, !!At the bottom on of one of the stuck papers it looks like it starts with "NB customers" !!
Pulls are 50`s,,no key/lock which it would have if 1920`s, or if it has one I can`t see it,,style is 50`s !! Not saying it hasn`t been worked on,,may have,, pics don`t enlarge !! Is that a brass plate at the bottom front ??