Can just the mint mark be doubled?

Hi
I am new to coin collecting. I have going thru tuns of coins my grandpa gave me and I found another odd mint mark on a 1958 D nickle. Chances are it is nothing but like always I like to make shore. What do y’all think?

 

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Not doubled.. but re punched.. this looks like an RPM-004 to me.

 

That's right. The mintmark was not doubled (meaning it was not doubled during the striking of the coin); it was repunched (punched two or more times into the die). We call these RPMs (RePunched Mintmarks).

 

thank you for the fast reply. what does the rmp-004 mean? And how rare is it? I can't find any thing on this in my red book.

 

RPM-004 means RePunched Mintmark number 4 for that date and mintmark coin as designated by someone. I don't see this particular RPM listed in the Cherrypicker's Guide.

 

go to Conecaonline.org on the left click on variety master listings. go down to Jefferson RPM and have some fun...