Yes, on that particular photo it appears that there might be a dent on the left side of the fourth digit, but none on its right, which would exclude the digit being a 3, and suggest a 9 or a 0. However, the dent on the left side is not visible on the first photo in my post #15 above:
http://www.mapleleafup.net/forums/sh...3&postcount=15
where the left side looks continuous, and not really apparent on the second, so my bet is still on a 0.
As for the dark colour of the digits, I think it's just the white paint ageing. The 'T' and first digit are still whitish, while the remaining digits have already turned dark. See also the white outline of turret #20 in post #2: part of it has turned dark.
Michel