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  1. #1
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    RPM Identification

    I went to school a few weeks ago on this forum and learned tips on identifying machine doubling. Now I would like to learn some tips on identifying rpm's. I have four 1974-S Lincoln's that I believe are rpm's and appreciate feedback on the subject. Thanks for the assistance. Hopefully I will get the hang of this quicker than my learning on machine doubling.
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    • File Type: jpg 4.jpg (141.8 KB, 12 views)

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  3. #2
    Die & Design Expert, LCF Glossary Author willbrooks's Avatar
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    1974S used 2 different mint marks types. One of them was a defective punch. The first 3 you have there are just banged up, worn mint marks, I'm not even sure which type they are from your pictures due to the damage. But what you have on #4 is definitely from the defective mint mark punch. (I happen to be doing a study/article on this very punch as we speak.) The damaged punch is characterized by a split upper serif and curl (1 and 2), a blob at 3, and also a cavity right in the middle at 4. This is NOT an rpm. All coins bearing this mint mark have those same characteristics. Photo by Ray Parkhurst.
    74S Coin 5_denoted.jpg

    *Important Note* There IS an RPM listed by coppercoins that had this defective punch. http://coppercoins.com/lincoln/diestate.php?date=1974&die_id=1974s1mm001&die_stat e=mds When you look at this link, you will see an arrow pointing to the top split. That is actually NOT part of the RPM like it suggests; however, the doubled serif at the bottom is NOT characteristic of the defective punch, leading me to conclude that this listing is in fact an RPM. Hope that makes sense.
    Last edited by willbrooks; 6 Days Ago at 03:49 PM.
    All opinions expressed are not necessarily shared by willbrooks or his affiliates. Taking them may result in serious side effects. Results may vary. Offer not valid in New Jersey.

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  5. #3
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    Quote Originally Posted by willbrooks View Post
    1974S used 2 different mint marks types. One of them was a defective punch. The first 3 you have there are just banged up, worn mint marks, I'm not even sure which type they are from your pictures due to the damage. But what you have on #4 is definitely from the defective mint mark punch. (I happen to be doing a study/article on this very punch as we speak.) The damaged punch is characterized by a split upper serif and curl (1 and 2), a blob at 3, and also a cavity right in the middle at 4. This is NOT an rpm. All coins bearing this mint mark have those same characteristics. Photo by Ray Parkhurst.
    74S Coin 5_denoted.jpg

    *Important Note* There IS an RPM listed by coppercoins that had this defective punch. http://coppercoins.com/lincoln/diestate.php?date=1974&die_id=1974s1mm001&die_stat e=mds When you look at this link, you will see an arrow pointing to the top split. That is actually NOT part of the RPM like it suggests; however, the doubled serif at the bottom is NOT characteristic of the defective punch, leading me to conclude that this listing is in fact an RPM. Hope that makes sense.
    Thank you again for the very informative explanation on what my coins exhibited.

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  7. #4
    Moderator jfines69's Avatar
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    Here is a link that may help with the different MM styles on the 74S http://varietyvista.com/01b%20LC%20D...k%20Styles.htm and here is a link to VVs info on the messed up punch http://varietyvista.com/Doubled%20Mi...f%201974-S.htm I can not really tell which MM styles you have the pics are a little to blurry for me but Will does know his stuff!!!
    Jim
    (A.K.A. Elmer Fudd) Be verwy verwy quiet... I'm hunting coins!!! Good Hunting!!!

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