RPM after 1989?

[Shleppodella1]

I thought RPM's didn't exist after 1989? But yet there's doubling in the date & mintmark it looks to be SE at 5 o'clock. Also note the separation at the top right of Memorial on reverse below 'I' in America.

[MintErrors]

In my opinion, you are right. no RPM's after 1989.

Then, the possibilities are its either worthless doubling or a doubled die......I believe it to be worthless doubling and damage.

On this coin, I see split plating damage. The coin was struck too hard, causing the copper layer to crack and expose the zinc core.
Doubled dies are two impressions or more of the design elements, at nearly the same height. All I see is die deterioration or worthless doubling.
Worthless doubling is best explained at https://doubleddie.com under the worthless doubling section of the website.

[Shleppodella1]

I have a 1999 & 2000 penny graded by PCGS errors that are broadstrike. Now I seen alot of similarities in this one to the graded ones such as the doubling and area on the reverse by the memorial. Do mechanical doubling and broadstrikes have the same effect on a coin?

[occnumis2021]

Do mechanical doubling and broadstrikes have the same effect on a coin?

only sometimes, mostly with coins that are plated. broadstrikes create some other neat effects if you look at enough of them but nothing related to listable doubling.

[MintErrors]

I have a 1999 & 2000 penny graded by PCGS errors that are broadstrike. Now I seen alot of similarities in this one to the graded ones such as the doubling and area on the reverse by the memorial. Do mechanical doubling and broadstrikes have the same effect on a coin?

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Broadstruck tend to be larger than the same denomination coin. Broadstruck coins are also not held by the collar in the striking chamber and due to this period of freedom during the strike, there's nothing to keep this from moving. The collar is meant to hold the coin steady and keep the coin round and metal movement within tolerances.

Mechanical doubling or any type of doubling can happen withe the proper striking of a coin. It's machinery that strikes these coins and nothing is an exact science. Things move, heat up, cool down and other factors happen. A train wreck of planchets may approach the striking chamber and throw the timing off just a bit, and by doing so, compromises the whole event.

We are talking about minute changes, and if that faulty event stays unnoticed, it can effect tens to hundreds of thousands of coins being produced by that mi ting press. It's a machine - things happen, and mechanical worthless damage rears its ugly head.

Doubled dies are more than one impression on a steel working die. It's a totally different thing. There are many more mechanical, aka worthless doubling out there compared to a true doubled die.

[Shleppodella1]

Thank you for that & your time !!!
Like I mentioned earlier I'm green but learn quickly. Lately I've been purchasing PCGS/NGC errors and then using them as references. It's not a bad way to be self taught. I place the said coin on the slab and get out the loupe and then go back n forth from left 2 right starting usually at a common starting focal . For me that is top dead center at high noon on both obv and rev. So if I don't see it on the raw like the slab it's usually NOT an error. One would think.... Then if it is I consult error-ref & variety vista for further confirmation. Any pointers please? Plus I got a scope that takes great pics so that way everyone has a decent photo to nothing worse than a crappy pic to work with !!! Plus it also stops that 90° out photo posting BS.

[MintErrors]

Each error is unique..Unique... when i talk errors, these don't include doubled dies, repunched mint marks, over mint marks, repunched dates, or overdates. Those are normally referred to as varieties.

A reference book like Arnold Margolis and Fred Weinberg of The encyclopedia of error coins is an excellent reference for understanding the minting process. It's a bit dated, But since the mint uses some of the same processes, it still can be used to logically think out the minting process and confirm or debunk a coin through logic and knowledge of the coin in hand or photos.

This is a link to many educational posts and videos from the U S Mint.
https://www.usmint.gov/learn/product...ess/die-making