Offering a 1966 copy of the Sanabria Airmail catalog. It’s a very unique detailed publication, shows rarities of over-stamps and details of airmail stamps from all over the world. There's 1350 pages, a wonderful reference book for serious collectors and hobbyists.
The book is in nice shape, the binding is getting fragile but still intact front and rear. There is some markings here and there in the pages, but it’s overall in great condition. See image 5 to get an idea of what's included inside.