A very interesting aluminum mess kit dated 1917 and produced by T.U.S.A. Co. (Treadwell USA Company) with multiple engravings including the initials "E.T.C.", "USA",  the Pennsylvania "Keystone" with the initials "PGH" inside (Pittsburgh), surrounded by three C's, representing the Civilian Conservation Corps and "1323" below the Keystone for Camp #1323 located in Marionville, PA.