I've just done a check of 1875 pennies on Ebay:
Obviously, many are that flat that it's not possible tell some apart...
Large date 120
Small date 74
1875H 14
F79 ( sea over circle) 0
Pretty much as usual
The Heaton version is touted as very rare, and isn't.( except in very good grades) and the F79 is hardly ever there- I see maybe 3 a year tops.
Maybe some of the F79 are that flat you can't tell, but where are the other better grades, since it's only rarity 13 or R5, supposedly?