Another one that I have no idea how to price because I can't find a single other one just like it, and since you all are so smart & knowledgeable I ask for your advice! A 1936 Firestone calendar with a colored 28.75"x13.125" illustration, the whole piece is 41.75"x20.875". It has all the months. How would you guys price something like this, do you think? The illustration on the top has almost a watercolor look about it and is brightly colored: a huge tire amongst trucks, cars, a motorcycle and a tractor on the road (many of the characters are waving at one another), a plane, a train, mountains, sailboats on the lake, and the cityscape of the Pittsburgh in the distance. The calendar pages themselves are black & white and the empty day slots on each month have little illustrations of Firestone products like Polishing Wax, Brake Lines, Tires, etc.