1943 Australian Penny Minted India

Sov' D.
The 1943 "no I " that you have pictured has a distinct shadow where the "I" should be. An interesting filled die coin but not the same as the 1942 "no I". Some 1942 coins in my collection have a similar problem (but can be distinguished from the genuine article as the true no I coins all came from the same die and have distinct die markers). I doubt the existence of true "no I" coins for 1943.

Yes I agree with nealeffendi that there is something suspicious about the 1943-I "no I" coin that I pictured but I don't think the story is as simple as just a filled die although that might be part of it. In the close-up I've outlined in yellow a u-ish shaped depression that is in the vicinity of where the "I" should appear but it only covers the bottom half of the missing "I". Why isn't there something that explains the missing top half?

Perhaps the die became filled & then the bottom half was over-filled leading to the depression in the coin. Is this possible?

Another peculiarity of this coin is the twist in the bases of the denticles from the R in REX through IMP to the R in GEORGE. Does this have anything to do with the "missing I"?

Except for the horrible stain, the 1942-I "no I" looks OK but please tell me what these distinct die markers are that distinguish genuine "no I" coins from "filled I" coins so I can check mine.

Thats correct its a different animal,i had forgotton all about the dot but many sold do not have the dot so they are a filled/damaged die of some sort and not the real McCoy.