For your consideration, here is a 1946 Kelso, Washington Foster Auto Supply Store Advertising Calendar Notebook, with 22 pages. It has advertising for Hasting Steel-Vent on the front and Casite Oil on the back. It measures 2 1/2 by 5 5/8 inches.
It has some wear and spots on the covers. There are creases in the corners. The first page has been torn out. The pages have not been written on. Item pictured is the actual item up for sale and comes from a non-smoking household. (36.58a-.3ob)
[Thanks for looking!]