I would be happy with any of the versions. Just sayin.
Oct
Invisible Oct overstamp black, Nov
Visible Oct overstamp black, Nov
If it's a book sent from a publisher back in 1939 to a store that my father could thumb through as a 9 year old, I'm golden I'm pretty confident my father wouldn't have cared back in the day, especially since many of his comics were remaindered that his aunt would bring him from the local store she worked at.
it was fun having him read a superman 2 and him being able to recount the story endings before finishing reading. Gerber books were great to peruse with him too. You would be amazed how many covers he recognized.