2018p Roosevelt Dime with severe Reverse die abrasions.

[Petespockets55]

Thank you Bob for the reminder about the die face being flat.
Just last night your comments about the shape of the die face from a previous post came back to me and made me question the "feeder finger" conclusion.
(How a flat piece of metal, the feeder finger, traveling in a straight line could produce a gouge that was deeper in the middle of the die. )
Some aggressive die polishing is what first came to mind. I guess I got confused because I've never seen such deep, perfectly centered and parallel die scratches from die polishing (especially with a perfect E-W alignment.) Maybe it was a machine mounted grinder or wire wheel doing the polishing. Just thinking out loud here but, I still can't figure out why it would have needed polishing in the first place because it appears to be EDS with NO signs of a clash on the obverse die.

Guess I'll file this one under 'Things the mint does that makes me go "HUH?"' -
Man that long list is growing longer in stead of shorter.

[jay4202472000]

I posted a similar dime somewhere, sometime ago. That narrows it down doesn't it?!? I'll try to find it and link it. I am almost positive that was the same conclusion drawn. The angle of the damage made me question the feeder finger theory. Almost all the examples I have seen on Lincolns are near a 45 degree angle, except the old wheats (north/south). I have never seen any east/west.


Edit:
Crap, it was on Coin Talk, before I was banned. I don't like that place so if you don't mind I will post 1 image of mine. It was a 2017-P.

[mustbebob]

It really is difficult to understand what causes some dies to be abraded like they are, but I may be able to shine some light on it.
During my second mint tour in 1999, I watched them abrade a die with what appeared to be a Dremel like tool. There are plenty of pedistal type grinders/buffers in the die shop as well. At that time, I was told that sometimes dies get tools or other heavy items (maybe another die during transport) dropped on them. Sometimes, the dies get dropped during installation. The resulting dings, dents. scrapes, etc. are then abraded. a lot of these drops tend to chip the edges of the incuse devices of the die. They abrade them to try and even out the surfaces so large(r) chips don't show up on the struck coin. This could very well account for abrading on an EDS die.
I guess ultimately, we should remember that the Mint is nothing more than a large machine shop. As much as they try to send out a good product, s**t happens!

[Petespockets55]

Bob, I love hearing first hand accounts of experiences and information of visits to the mint.
I've actually imagined a machine shop scenario at the mint making it easier for mishaps to occur. And many types of fixed in place and manual equipment like I use in remodelling. Different types of tools to accomplish the same task with slightly different restrictions or limitations.

[jfines69]

Bob, I love hearing first hand accounts of experiences and information of visits to the mint.
I've actually imagined a machine shop scenario at the mint making it easier for mishaps to occur. And many types of fixed in place and manual equipment like I use in remodelling. Different types of tools to accomplish the same task with slightly different restrictions or limitations.

Not that Bob is old but he has some good 1st hand info on the first coin presses the mints used You said this dime is an EDS??? The edge of the die wear down faster than the center and result in a convex shape, as opposed to conical, to the die face... The later die stages are what gives us the clashes on cheeks, necks, jackets and hair areas... If memory serves me correctly the mint uses the same presses for all denomination of coin??? If that is the case the the design and travel of the feeder fingers would be the same... If the abrasions on yours coin are feeder finger damage then the dies were installed in a different way compared to the CENT dies!!!