1977 Kennedy Hd Possible RPM?

If I had found this one, I would have let it go as probably being Machine Doubling.

Look here :
http://www.varietyvista.com/12%20Ke...intmarks.htm
and peruse the pics of the different known RPMs on the Kennedy series. You will note RPMs tend to have either notching, or else the MM underneath the top one has distinct, rounded top surfaces just like the one covering it (unless the top one is worn).

By rounded surfaces, I mean to look on your coin and see the "doubling" along the D's spine has a flat top to it. Humor me and pretend you were an tiny ant crawling down off the top D. Your feet would hit a flat step that was the "top" of the second D.

With true RPMs, that lower "step" would be rounded like the top one would be.

As the the part on the bottom of your D, it looks as if something hit the MM and made a dent.

Here is an extreme MD MM from a quarter of mine.


Note how flat the "first step down" is.

it's not a RPM and it took a hit at the bottom.

Thanks to all. Just want to know what OMM stands for?

Thanks. Very good to know.