I weighed this penny because it is thick like a nickel but the same size as a penny and no it's not two Indians stuck or smashed together.see edge pictures? It looks and feels like silver but what coin back in 1864 was this size and weight 4.48g?
There were three major varieties in 1864 for the Indian Head cent: the CuNi one seen here and two bronze varieties; with and without L on the ribbon behind the head. The "L" stands for the initial of the last name of James Longacre who designed the coin. The L variety of 1864 Bronze Indian Head penny is the rarest of the three varieties.
@ SHIRDIUS .... My humble suggestion is to purchase a "Redbook." Yeoman's Guide Book to U.S. Coins" breaks down the types and varieties of coins like this one. Older volumes of this guide can be had for a buck or two. These guides cover colonial and some early token issues as well.