This first U.S. currency matching today's compact size was introduced with the 1928 series. The silver certificate pledged a silver dollar on demand, a type of currency that was withdrawn decades ago. Its striking reverse design entirely differs from later U.S. dollar bills åÑ that's why it's affectionately known as the "Funnyback" today. Seals and borders of the Washington obverse also differ distinctly from subsequent dollar bills. Our Very Good quality circulated when "a dollar was a dollar."