Lapel pin with 1960s-era version of the 89th Airlift Wing insignia with capital letter N at bottom. It belonged to navigator, Christian A. Tack.
Christian A. Tack was a WWII navigator who flew 26 missions as a B-17 navigator stationed at Deopham Green, England.
Later in his USAF career, he was assigned to the 89th Airlift Wing at Andrews AFB, Maryland.