Two WWII Era German Flags NSDAP and Hitler Youth

Two WWII era German flags includes a typed and signed letter that reads as follows: "To Whom It May Caoncern: Two German Natzi Flags were confiscated in World War two in 1944 from the group of 459 anti air craft division, out of S.S Head-quarters. Was sent back to U.S.A. 1944 by Edward Karoghlian who was servin in that Group. Signed "Edward Karoghlian". This letter has not been authenticated but the signature refers to Edward Karoghlian, PFC in the US ARMY during World War II. The first flag is a NSDAP measuring approximately 6' x 46" and has two cotton string ties. The Hilter Youth flag measures approximately 70" x 45" and has four rings to display as a banner. Both flags are double sided. These both appear to be period correct material and show some discoloration spots but have not been authenticated.