1951D quarter, RPM or MD, or both?

[MorgansRmine]

After reading the mojaveblue post and Charles response, had to go back and recheck this one. Oringinally dismissed this as just MD and damage. Now, not so sure.




Opinions?

[coop]

It is both. RPM on the serifs and Machine doubling on the East side of the mint mark. It happens.

[Dick]

just looking at the serifs, gave me the idea that it was an RPM, and on the curve, possibly damage. I don't see thart well.
Dick

[eagames]

Both look like RPMs and strike/machine doubling.

The cents machine doubling is mostly North but the extra vertical bar of the D is East.

If I find a variety with MD that adds confusion I'll toss it if I find one without the MD. Sorta like finding an RPM with a big hit on the mintmark.

[GarryN]

When, again, did mint marks cease to be hand-punched into the die?

[MorgansRmine]

Garry, 1989 was the last year of the hand punched MM.

[GarryN]

Thanks, so that means any doubling on a pre '90 mintmark would be an RPM, I assume.

[coop]

Correct as long as it is not machine doubling.

[eagames]

[Dick]

Why would the "doubled die", not be possible, along with the RPM, or MD, (as long as it is not on the same coin) "MM"?

[eagames]

Dick,

We're talking mintmark doubling.

So the rule 1989 and older doubling on mintmarks must be from an RPM or MD works. Because mintmarks were punched after the die was made so you can't explain a doubled mintmark on a 1989 or earlier as being from a doubled die.

[Dick]

Ed, I was thinking along another line, and it is loike comparing apples and oranges, as all being citrus.
That is the nice thing abouit Canadian large cents, and the die discovery search. it can get most confusing.
But it IS very interesting.
Thinking about it, seems to be a logical step, or sequence of steps, to go from lincoln varieties to FE/IHC, varierieties then to the Victorian varieties. It tends to get deeper as you go.