1951D with extra D

[Robert]

Wexler writes in Coin World about a 1951D cent which may have an extra D in the date. He is skeptical and so am I, judging by the photo. He's asking for more examples. Has anyone ever heard of such a coin?

That same article (p. 52) shows a 1928 DDO. To my un-expert eye, the pic looks like strike doubling to me. Kind of shelf-like, but you can't see much of the photo. Does such a thing exist?

Also he says "DDs showing on the date always seem to be more popular than varieties that show equal amounts of doubling elsewhere on the coin." Is that generally true?

[coppercoins]

#1 - I believe that was first published in his 1996 book, The Authoritative Reference on Lincoln Cents. I did not see it as an RPM then, nor do I now. I believe it to be a well-placed and shaped die break.

#2 - I cannot see the photo, I let my subscription lapse and haven't renewed, therefore I can't judge it for myself. If Wexler says it's a doubled die, chances are he's right.

#3 - True statement. There are a number of examples that show this very thing...1964P-1DR-001 is a very strong doubled die reverse, and typically goes for $25-$50 in BU. 1972P-1DO-001 is about the same strength, but because it's on the obverse of the coin, it sells for MUCH more, as much as $500-$750 in BU. This is only one of many comparisons that can be made.