United States, Military Payment Certificate, 5 Cents, Series 681 (ca. 1969). Serial # C06844710C, Position 16Consecutive Serial # with Lots # 31596, and 315985 Cents note, printed Series 681 (circa 1969) Vietnam War IssueIssued by United States ArmyDark green on light blue underprint; submarineBack: Dark green and blue; astronaut in spacewalkPMG certification # 1073815-010. Pick M75 (Standard Catalog of World Paper Money: Modern Issues by Cuhaj); www.banknote.ws. PMG Gem Uncirculated 66 EPQ.