I have these doubles I don't need for my set books. Appears to be from the 30, 40s, and 50s. I can sell them all or individually at a fair price (About.com prices that dealers would pay). I don't know if anyone wants these since these are all newer years. May want to sell teens since I have been working on two 1909-1940 books and may just work on one. I did soak some in alcohol and distilled wate and a couple look like they have something stuck to them and I am soaking them in distilled water. Click the picture below to see the years:
