This is one of 6 Washington nickel patterns produced in 1909, 4 of which, like the present example have Washington's portrait facing to the right. This used to be J1783 in earlier editions.
This one is very similar to J1934/P2017 with 7 stars to the left and 6 stars to the right of the word Liberty but with a smaller date. This used to be J1782 in earlier editions.
The reverse is similar to one used in 1896 on J1770-J1772/P1986-P1989 but with the motto "E Pluribus Unum" added.
It is unique with the only example in the Smithsonian.
Photo courtesy of the National Numismatic Collection of the Smithsonian Institution.