We have thoroughly K.I.S.S.ed the C-47 and found nothing close, despite promising looking areas.
One might argue that a war time C-47 could have had non-standard repairs here and there, but if I have the right C-47, it was new, having had one repair of record where a wing was dinged in transit. That might be a possibility except one encounters the same problem with fitment to any known structure on the C-47 that we did with the belly and other areas of the L10. Which is largely how we came to focus on the lavatory custom window cover as a possibility (there would be no underlying structure to govern what may have been an improvised installation).
Lots of things are still possible and 2-2-V-1 could go either way - toward or away from, NR16020 as a source at some point.
But rest assured - K.I.S.S. was alive and well when the C-47 and many other possible sources were examined; 2-2-V-1 could be a wild card yet from another type, but what a number of 'coincidental' ties it suggests with NR16020. Kind of neat, we'll see in time.
ADDED: As to the mysterious 'font' scheme -
I recognize that the font style question could be a disqualifier, but as yet I don't see it as such: no one has provided a definitive history of font style usage in the aluminum industry that would rule out what we think we see on 2-2-V-1 as era-correct. The examples on the C-47 and L10 could have come from anywhere, anytime - that is realized. I believe we already debunked the 'reserve stock' as an erroneous statement given by the aluminum maker; it is merely a 'different font' - origin and time unknown, except we of course find latter-day examples (duh). Was aluminum stocked in Miami marked differently than that stocked in Burbank? How many plants did Alcoa have, how many runs, how many methods of marking, when did they change / were multiple methods in use / different locations? Who ordered what / when? Have we seen examples of fonts from the Pan Am flying boats? They were a big customer in the Miami area, in all likelihood. No doubt there were others with stock there.
We have had examples provided that suggest that sans-serif is a later device, but those are not conclusively proving - and we have seen a surprising number of variables from various eras. We also seem to think that what we see on 2-2-V-1 is an italicized sans-serif, but have some reason to question that as well: what is left of the image is not so clear, and bears some suggestion of serif presence to some eyes.
We continue to have an arguable fit for 2-2-V-1, as well - still being investigated; to the degree 'a fit' is not proven, it remains that a 'non-fit' is also not proven. How likely is it? I'm a big fan - but have always held it to be a long-shot. Now we're closer than ever to finding out - I must know, and that means sticking it out beyond the fluff of too much argument: press on for the hard-headed answer as best we can get it, up or down.
Want to believe? Then you have to take a chance and examine sans-bias the best that you can; but you have to have some bias toward believing that a given prospect has a good degree of success, or you merely question, question, question while others dig, dig, dig. Grab a shovel and believe in the prospect, if you'd like to take the chance.
If you don't want to take the chance, well, most people don't I guess. And oddly, many of those can't seem to stand others of us laboring that way and would dissuade
. For me that's that world Earhart herself didn't care for - the one where nothing ever happens. She was flawed, but she did a lot - how wise may be questionable - the object of our search screams that loud and clear. But we still care and look, don't we? "Something happened". Something can yet happen as well.