Wanting to now which key & semi-key date wheat pennies from before 1920 are of the best value, I ran the mintage and the price of the coins in EF in the
RedBook. The higher the percentage, the more underpriced the coin is. Here is what I came up with for the coins under 6.5 million minted:
(winner!) 1910-S: 220%
1913-S: 171%
1911-S: 162%
1915-S: 155%
1912-S: 138%
1914-S: 133%
1909-S: 59%
(control)1909-S VDB: 0%
1914-D: -81%