Neil Armstrong’s personally-owned “Yokohama Officer's Mess” coupon booklet, 4.25 x 2, issued to Armstrong as book No. 189213 by Army Post Office (APO) 343 in Yokohama, Japan, while he was serving in the Korean War as a naval aviator. Includes a coupon ticket, 2 x 1, valued at 10 cents and marked “Good in Trade Only.” Both are encapsulated by CAG as being from the Armstrong Family Collection. In overall very good condition, with overall creasing and soiling. Accompanied by a letter of provenance from The Armstrong Family Collection, signed by Armstrong's sons, Rick and Mark. Provenance: Heritage Auctions, The Armstrong Family Collection III, July 2019.