There are copies made for nearly every date/mintmark collection for US Coins. Some are well made and meant to fool collectors, others are clearly marked COPY and designed to be a space holder for collectors who can't afford the original coin and still others are contemporary counterfeits (and contemporary counterfeits are usually collectible) and these were designed to pass for $20 back in 1931 and were usually gold plated.
Giant Eagle was created in 1931.
Only 4 denominations of US coins were struck for 1931. The $20.00 gold Double Eagle. The Mercury dime, Buffalo nickel and the Lincoln cent
Featuring the Saint was created in 1931.
Alias the Saint was created in 1931.
1931
Double Cross - 1931 was released on: USA: 5 July 1931
Saint Gabriel's School was created in 1931.
Saint Emma Monastery was created in 1931.
Congregation of Saint Thérèse of Lisieux was created in 1931.
Saint Paul Municipal Grain Terminal was created in 1931.
Saint Petersburg Academic Symphony Orchestra was created in 1931.
Chief White Eagle has: Played White Eagle in "The Last Ghost Dance" in 1914. Played Nipo in "The Heart of Wetona" in 1919. Played Indian in "Oklahoma Jim" in 1931. Played Indian in "Fighting Caravans" in 1931. Performed in "Trails of the Golden West" in 1931. Played Chief Grey Bear in "End of the Trail" in 1932.