Good to see these finally getting the market recognition they deserve. The General Merchandise Company made this set of slot and tab containers. This is one from the complete set of six. (All can be seen on page 54.) G.M. also issued other Halloween-themed slot and tab containers that are far less common yet possess the same sense of odd whimsy seen in their most widely sold set. I have become a fan of their output, so routinely search for their harder-to-find items. (Examples of some of these can be seen on pages 53 and 296.)
Mark B. Ledenbach's vintage Halloween collectibles blog.