1957- D Lincoln Penny OMM?

I'm in the RPM camp, check coppercoins to see if you can find a match. https://www.coppercoins.com/lincoln...pe=mm&page=0

Wow, You're right it is a:

1957D-1MM-005
| D/D SOUTH
CONECA: RPM-005 Crawford: CRPM-001
Wexler: WRPM-005 FS#: unlisted
A nice spread to the south shows all along the lower edge of the mintmark. Obverse is also listed as 1957D-1DO-002.

I didn't realize there were so many and never looked at https://www.coppercoins.com/lincoln...pe=mm&page=0

Thanks for the help this is my first RPM.

Coin Idiot,
Fixed your title.
In what year did they stop making OMM's?
John1

Nice find! You might want to try giving your coin a soak in 100% pure acetone to help loosen the crud, on the reverse.

Thanks John1 and I would say the last year it could have happened is 1989 because that was the last year for hand punched MM. Had to look it up, am I right?

Errers and Varietys, some else also suggested that, I think I'll give it a try, can't hurt at this point.

Tacc, yes here are some better pics:





https://www.coppercoins.com/lincoln...ie_state=lds

And, Thank you Coinfrog.

This is my first RPM, cool.

I have 5 more pennies from this same book:

1952 D
1953 D
1955 D
1958 D
1959 No MM

All in the same condition, no DDO's or DDR's and the 59 is not a Wheat.

Congrats on your fist RPM find!

Here's a question: if a mint mark were found today on 1990's to present that was doubled, would it be considered a doubled die obverse or would it be called an rpm?