1985-S Proof RPM?

[JPringle]

Hi all! While looking through some proof sets, I found these two 1985S cents with the same anomaly. One also has a break in the plating, but the size, shape and location of the underlying doubling is the same. Do you think it is a RPM? I include an overall shot of one of the cents for context...

[MintErrors]

In my opinion, it looks like it is copper plating damage. If you can see any blue color or slight staining in that area, it would be related to that. It happens when a strike is a bit too strong and the strike breaks through the thin copper layer. It can expose the zinc core underneath. Additionally proof coins are normally struck more than one time, to bring out all of the details of the coin. Either the planchet/ coin/blank might have e shifted very slightly between strikes.

I just checked http://varietyvista.com and they do not have any documented varieties in the 1980s from San Francisco mint for Lincoln proofs.

http://varietyvista.com/02b%20LC%20R...20Listings.htm

[occnumis2021]

nice images. the "break" in plating is almost certainly just haze? somewhat common to proofs. dont dip copper/bronze coins like other metals tho.

[JPringle]

I just remembered I have another 'scope!
So both coins exhibit doubling to the west on the upper loop of the S, one coin also has a break in the plating, which roughly conforms to the top side of the doubled area.
The exact duplication of the location, size and shape of the anomaly is what made me think RPM.

Cent1985 mic2.jpg

Cent1985-2 mic2.jpg

[occnumis2021]

i agree with MintErrors about the split plating, which is VERY common to bronze (zlincolns) cents/coins, not just usa.

the images are decent and while one of the images DOES kinda have that rpm look, it is extremely unlikely. 98% no, 2% yes?

happy hunting!

[JPringle]

So both coins having the same outline, down to that flat spot on the curve, you don't find significant?

[occnumis2021]

for my part, not sure much more i can do.

either ddo/ddr/rpm match known ones or they dont, if none exist and we look at images provided and no conclusion is reached to the posters satisfaction, you always have official channels to use.

just remember we only have images to go by and sometimes that isnt enough although im against this being a new rpm from these images and one surely is just split plating or similar.

let us know how it goes!

[IvoR1!]

So both coins having the same outline, down to that flat spot on the curve, you don't find significant?

It looks like to me a wrinkle in the copper plating caused from the split.

[MintErrors]

In my opinion, the large, over magnified photos show it almost as a sliver. They strike these proof coins more than once to bring out the coin design at its best. If there is a slight unexpected movement within the process (machine or coin) in between the strikes, then that's enough to cause this to happen.