Maybe mm?

Wondered if this is an example of a mm error it's on a 79 Susan b anthony

 

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No it's a error. There two types of mint marks for that.type 1 and type 2.Yours is a type 1,The type 2 has a clearer mint mark.

 

So what is the cause of this error

 

Honestly I really don't know.But IMHO I think that those type1 mint marks are RPM'S.I have a ED's/early die state of that same SBA dollar and you can see a D under the S,But I maybe just seeing things,As they say you only see what you want too.

 

SBA's are notorious for 'mushed' up MM's.

There is nothing special about the MM on
your dollar, from what I can see in the photos.

 

MR.Weinberg.I have a question for you,Can you see the D under this S?

 

Also could you please explain to me why the mint would use two different S mint marks for the same coin?

 

No, there is no D under the S

 

How many d's do you see?

 

Mine also looks like a d and an s placed over eachother