I photographed these Beech King Air examples at Boeing Field, Oshkosh, Udvar-Hazy, Olympia and the Hot Springs County Airport in Wyoming.
The military version is the Beech U-21 Ute. The Model 90/100 line is tied closely with the Beech Model 200/300 Super King Air but note the difference in placement of the horizontal stabilizers in relation to the tail..