You have a few different types in your photos,
W514............. ie Cobb #43
W516-1 ............ie Hooper #27
W519-1 (tough) ........ie Gleason
W522 (tough) .........ie Mathewson #39
PS everything is rarer than T206, they are the most common PreWar cards.
And the term is "blank back", not "paper back" ...thats a book
