You are purchasing the exact item shown in the photographs. I do not notice any perforation separations or oxidation.
This is an exquisite item. This is a top left corner selvage position block - very desirable - with part of the arrow at the far right in the top selvage.
I notice one inclusion of wood paper pulp (brown spot) in the paper on the bottom stamp second from the right. This is a natural thing, but I want you to know it is there.
It's visible in the photograph. From a recently broken VERY FRESH large multiple. Very fresh and lovely - Just as fresh as can be. The item "US Scott# C1 Airmail Stamp BLOCK of 10- Beautiful Mint Never Hinged FRESH XD" is in sale since Saturday, November 25, 2017.
This item is in the category "Stamps\United States\Back of Book\Air Mail". The seller is "ivymontcpa" and is located in Richmond, Virginia. This item can be shipped worldwide.