This is a white metal reverse die trial, lacking dentilation, of the Standard Silver design similar to that used on J939/P1052 and others. On this trial, the date is larger and higher. The word "Standard" has been effaced.
This piece is listed as being ex-Nagy and recently reappeared in American Numismatic Rarities 12/03 sale to the Simpson collection where it was offered in Heritage 9/20 sale as PCGS62. It is likely the piece offered as lot 291 in Elder's 2/7/1910 37th sale. Taxay listed this as also being in the 1958 ANA sale but this was an error.
Photo courtesy of American Numismatic Rarities.