Based on a pin-up photo of Hilda Simms for the Mar. 25, 1945 issue of Yank, the Army Weekly, a weekly U.S. Army magazine.
The magazine was written by enlisted rank soldiers only and was made available to the soldiers, sailors, and airmen serving overseas. It was published at facilities around the world—British, Mediterranean, Continental, and Western Pacific—for a total of 21 editions in 17 countries. Yank was the most widely read magazine in the history of the U.S. military, achieving a worldwide circulation of more than 2.6 million (source: Wikipedia.org)