Coin World article with some interesting theories on 'ugly' 2019 W proof Lincolns......

thebeav

https://www.coinworld.com/news/us-coins/2019/03/packaging-safe-for-premium-2019-w-lincoln-cents.html

ricko

I received two of the W cents and one exhibited the same marks as the illustrated coin. Then other was mark free. Cheers, RickO

CaptHenway

On the coin illustrated in the article, my guess would be that a thin film of grease on the die left contaminants on the coins that quickly discolored them.

fiftysevener

With that copper coating only microns thick could it be a planchet problems ?

dan_marinelli

Maybe because they're made with crap metal. For the price they're charging they could make them out of copper and not have any of these issues.

RogerB

Disappointing that CW did not ask an expert in die making and coining - most of the guesses don't make sense in the modern minting environment. Maybe the US Mint could help with suggestions?

jabba

Very interesting never thought of it being from the dies

vulcanize

Shamelessly bumping a three and a half year old thread to say - Yes. They were very disappointing.

LanceNewmanOCC

i didn't buy a huge number of proofs/bs strikes but i wasn't impressed with the BS either. fwiw

Zoins

@thebeav said:
https://www.coinworld.com/news/us-coins/2019/03/packaging-safe-for-premium-2019-w-lincoln-cents.html

Good to see the theories on how these were made from George Houle. Any ideas from our error experts?

Same locations
Some collectors have expressed concern about the quality of the Proof 2019-W Lincoln cents themselves.

California collector George Houle ordered four 10-coin 2019 Proof sets from the Mint. The shipment also included the premium Proof cent with each of the Proof sets.

According to Houle, “the four premium cents exhibit distracting marks on the same location on the obverse of each coin — in the field below the IN in the motto, in the field to the right of the second T in TRUST and along the rim above the blotch in the field.”

Houle suggests four possible scenarios that he believes may be responsible for the marks:

• “One of the Dies were installed incorrectly, or unevenly in the Press head creating an uneven pressure to the blank. NOTE the marks are repeated in the same area, Not something a bag could repeat or a difference in the coin blank composite material. The marks are consistently in same area.
• “One of these Dies were polished incorrectly that left a low or a high spot on the face of the die causing and uneven pressure applied, similar to the three legged Buffalo die that was polished and the leg removed. Once again, the marks are consistent in the same area.
• “The difference in Color is pressure related, [caused by] Striking, handling, movement of a down stream automated device, etc., otherwise if chemically induced, the coloring would vary without a pattern or specific area on the coin similar to the Milk spots on the blanks from the late 50’s and early 60’s [Franklin half dollars] due to soap on the blanks being stuck into the silver.
• “They are not [on] every coin, this isolates them to a Press, a Die or a automated piece of machinery on the production line. Possible one Stamp press not functioning at the proper pressure? A Die that is not damaged yet placed in the press incorrectly or with dirt under the die body causing a difference in stamping height? A piece of equipment that transfers the coins on one conveyor or feed line applying pressure to the coin before or after bagging. ...”

ctf_error_coins