Vintage Sarfanguaq USAF Aeronautical Approach Chart Map—Restricted

Description

I have a lot of old aeronautical maps and charts that belonged to my father-in-law, a career USAF pilot.
During WWII he flew B-26’s out of England. Towards the end of his career, he flew for MATS (Military Air Transport Service).
Sarfanguaq is in Greenland. This chart is dated February 1951, First Edition. It is marked “Restricted”. I assume that it is no longer restricted after 70 years! (If it is, someone please tell me.)
The map measures approx. 28.75 inches x 22 inches.
Unfortunately, my father-in-law’s son signed it when he was a child. Other than that and being folded for decades, the map is in perfect condition.
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