Thanks for the pictures Jerry.
Your ‘undoubled’ example of Ka does seem to reinforce that this is a different type of overdate to my Kb examples.
Perhaps even more interesting are your middle 3 pictures which seem to not just show the protrusion top left (like an F114 Ma) but also top right too. I think you would be justified claiming this as a new type of F111 requiring documenting, Kc.
Your F114 Ma (final picture) is exactly as I have seen myself. It’s interesting that MG says on his page 79 “the only part of the 1 that can be seen, on this example, is the small portion that sticks out centrally, half way up the 2”. I think, however, that the tiny protrusion top left can also be seen in his picture on Page 79 and may even be a clearer identifier than then protrusion halfway up the 2.
I attach my own example as confirmation of this type.