Question: how much is one p in american money

title: United States one-dollar bill
text: In 1929 , all currency was changed to the size which is familiar today . The first one - dollar bills were issued as silver certificates under Series of 1928 . The Treasury seal and serial numbers were dark blue . The obverse was nearly identical to the Series of 1923 $1 silver certificate , but the Treasury seal featured spikes around it and a large gray ONE replaced the blue `` 1 DOLLAR . '' The reverse , too , had the same border design as the Series of 1923 $1 bill , but the center featured a large ornate ONE superimposed by ONE DOLLAR . These are commonly known as `` Funnybacks '' due to the rather odd - looking `` ONE '' on the reverse . These $1 silver certificates were issued until 1934 .