For sale is a mid-century WORLD BOOK ENCYCLOPEDIA ADVERTISING PIN. The button features a quill over an open book with the slogan “WE NEVER GUESS WE LOOK IT UP”. An interesting advertising collectible or fun gift for a teacher.
Before the Internet and Wikipedia there was World Book Encyclopedia. The World Book Encyclopedia covered all major areas of knowledge uniformly, but devoted more focus towards scientific, technical, and medical subjects. World Book was first published in 1917.
