1960-D/D 10c RPM FS-501

Coop, you are an incredible talent, my friend.
Here's what I came up with, and you're right, that dot on the end does not exist on my coin.





If a mint mark can be the only thing on the coin that is showing doubling, then sure, it very likely is MD. I hope it is not. It's like 2 D's on top of one another only the one behind is slightly lower and to the right. Both seem pretty chunky and the whole mark is overall very full and out of place looking.

What is that dot on the east side of the mintmark? That is the first punch of the process that the worker felt was too close of the design or the second punch was the final area to be punched. On the FS-501 that is part of one of the punching. The location is the second location. So this is an example of a RPM. So with out that mark on the east side of the mintmark, it is not that die number. The central area of the RPM has worn off the die, or was polished off. That is what we see on the inside of the inset image, but don't see on the other images. The East area is seen on the examples of that die. Also the location of the mintmark is also key. If it is not in the correct location, it is not RPM number or is a normal coin.

CoopHome: What must be present to be a RPM that is legit?
See images above on this thread to see the discussion point.

Or is it that maybe this is damage where the D was struck and slid after the coin was struck? Def looks like MD this close.

I don't think it would have been altered. It's been sealed in a Mint Set. It's actually a really nice coin overall.

I've seen you mention these types of markings before. In those cases, does that add a premium? Or is that considered damage as well?

My vote is MD.
John1

On some mintmarks that get hit like your coin, the mintmark is taller than normal. So when the MD did a higher bounce, it missed the other devices, but the whole brunt was on the mintmark area. Thus why that is distorted on your coin. A high bounce of Machine Doubling flew over head of the other devices. How do I know that is the case? (Sherlock revealing a secret) Note the fine lines on that affected area? Those are striation lines. We see these when a sharp edge of the die affects an area on the coin. It is like the forensics of a knife blade used in determining an autopsy. These are seen on Machine Doubling lines. I call them striation lines. When I see this, I feel this is not a coin contact issue, but a die sliding issue. Other examples below.










On the last image you posted, it was the first case of full brunt contact of MD on a single device. Note how much stronger it is from the examples of full devices striation. Thanks for post that. Now I can keep on the watch for more of this happening. Not a premium for it, but more like the last piece I needed for my puzzle. Another coop secret revealed.

CoopHome: What is a striation line and what causes it? Why is this important? (coop secret revealed, another sign of Machine Doubling happening

Coop, as always, your in-depth analysis is fantastic. My question this time around is, why wouldn't there be these striation lines on other parts of the coin. If the die is sliding, wouldn't there be other indications somewhere else? More specifically, in the bottom of the torch area or the lettering on the reverse?