Buffalo Nickel guys, please help with this MM

Check out the following auction. Does this look like an added mint mark to you? I'm not interested in buying the coin, I'm just interested in seeing if my eye for a questionable coin is justified. Thanks
Auction
Auction
0
Comments
Picture
That said - the bottom of the 'S' in the super-sized picture does not look 'right' to me...
Total Copper Nutcase - African, British Ships, Channel Islands!!!
'Do not meddle in the affairs of dragons, for you are crunchy and taste good with ketchup'
Does the last 1 in the date look slanted? Like maybe it was really a 7?
who knows...
Total Copper Nutcase - African, British Ships, Channel Islands!!!
'Do not meddle in the affairs of dragons, for you are crunchy and taste good with ketchup'
K S
(I have twelve of this date from G to EF)
Joe.
1966-1971
Funny... we discussed the same thing.... but we feel that the mint mark is
part of the coin and not a altered coin.... but regardless here it is for
you....PS our reserve is $149
The pics he sent are over 130K so I can't upload them here, but if anyone wants I can email them to you. No signs of tampering to me. But I'm not an expert.