OK, Ray-- thanks for the heads up-- as long as there is interest, I'll continue. Easiest to start with the "E" relief.
This stamp is 41L8, and was fairly easy to plate because of the imprint on the left side of the stamp:

Similarly to the "F" relief, there is damage to the relief in row 5 and row 9. The damage can be found at the top of "Postage", right between the "s" and "t", where there is a spot where the curve isn't a curve and drops below, slightly. That is how to identify an "E" relief. Also, unlike the "A", "B" and "F", the curve at the bottom does not ever reach the beginning of the letter "E" in "ONE".
So, if the curve stops before "E", it is either "C", "D" or "E" relief.
For me, "E" reliefs can cause road blocks-- there are not ever side scratches on "E" relief, so if you can't see the top, and if there are no side scratches, and if the curve does not go beyond the "E" in "ONE", the stamp can be one of three different possibilities:
1-- and most probable, "E" relief
2-- and less probable, but definitely possible, "C" relief, Type Va
3-- same as above, possible, but not probable, "D" relief, Type Va.
Problem is that I'm always trying to find Type Va. So they're usually "E" relief "Type V" when you can't see the top of the stamp, but it's hard to tell, and you have to look at a lot more charts to try to plate the stamp.
GOOD news is, if you CAN see the top of the stamp, and if there are no side scratches, and if the curve does not reach the letter "E" at the bottom, and if it is NOT "E" relief, you definitely have a Type Va stamp......
"C" and "D" reliefs to come later.........thanks Ray