There is a #52 written in ink on the top of the first page inside. Near the back of the book on one of the ad pages there is a boys address filled out on the intended space but page is intact.
The # 52 on the front cover is not present as shown. Straight out of a long time collection. The item "FANTASTIC FOUR # 52 Black Panther 1966 Marvel Nice" is in sale since Friday, May 3, 2019. This item is in the category "Collectibles\Comics\Silver Age (1956-69)\Superhero\Fantastic Four".
The seller is "leejuke" and is located in Longmont, Colorado. This item can be shipped worldwide.