As mentioned, the Friendly Eagle Variety is often overlooked. It would be on the 1971-D, reverse. Look carefully at the eagle's face. Most have an extra line over the eye, making the eagle look angry. The FEV is missing this line, hence the name "friendly eagle".
In a large lot like this, you should have at least 1 FEV, I would think. I have found 13, 4 from Ikes from searching customer dumps at the bank, and 9 from large lots of Ikes.