Gift of George Allen, 2022., Safety bar pin with metal locking clasp. AEF in the center of a red keystone with a blue background. Written on the recto: Auxiliary. Society of the 28th Div American Expeditionary Forces 1917 1819[sic]. Marked on the verso: B.B. Co. STER. Pat.2066969. The 28th Infantry Division represents the Pennsylvania National Guard and was also called the “Keystone Division.” The Division served in World War I, including at the Battle of Chateau-Thierry.
