I know a point was made in regards to the tabs. That is certainly an interesting part of this piece as it was not used much during that time and if another item existed with that design it would say something significant.
For anyone doubting the use of tabs, check out this other item from General Gum used in 1934 as well.
Use of tabs look familiar? The height of insertion look familiar?
http://www.moviecard.com/gallery/rcards/r56.html