This is a very difficult variety to spot by looking at the height of the numerals. It's far easier to look at the lower loop of the "9". On the large date it points down to- ward the mint mark and on the small date it's nearly horizontal. This works without fail on the mint state coins but you'll need to have both to compare on the proofs.
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Isn't the small date level across the top and the Large date the one uneven?
Ken Potter's 1970S site w/pics
"You Suck Award" - February, 2015
Discoverer of 1919 Mercury Dime DDO - FS-101
far easier to look at the lower loop of the "9". On the large date it points down to-
ward the mint mark and on the small date it's nearly horizontal. This works without
fail on the mint state coins but you'll need to have both to compare on the proofs.