Authentic World War 2 Radio Map of the Atlantic

Description

My father was a radio operator on a B25 in WW2.  This map appears to be some of the radio beacon zones that they have used during that time as this is one of the items he kept after the war.   I have no real knowledge of its history except that we have kept this map in the family since the war.  I don't know if this has any value to anyone, but I want to make sure this piece of history gets preserved if needed.
Overall it is in very good condition considering how far it has traveled over the years and how many time it has moved.  They paper is intact but does show some yellowing and aging.
I believe that it will be quite expensive to ship, so please keep that in mind if you express your interest.  It is 58" x 43" and brief research looks as it could cost 0 - 0 to ship in the lower 48.  I have listed shipping at 0, but buyer will assume the full cost of shipping.
Thank you for looking and I hope this is something someone might want to preserve.