Stan McDonald - author 's Blog

30 Dec 2021

Top ten ways to destroy coins - Part 7

| Stan McDonald - author

One of the worst places to store coins is in any metal box, especially those that rust. Most metal rusts over time – the oxygen in the air condenses with water vapor and creates rust. Aluminum containers will retain moisture and even these containers will accumulate "white" oxidation.

29 Dec 2021

Top ten ways to destroy coins - Part 6

Coins | Stan McDonald - author

Coinflips (non-PVC) is a standard method of storing coins. Flips are suitable for temporary storage for coins not in uncirculated condition.

27 Dec 2021

Top ten ways to destroy coins PVC - Part 4

| Stan McDonald - author

PVC (polyvinylchloride) destroys the surface of a coin. Streaks, spots, a milky color, and other distractions are prevalent. PVC is found in plastics, such as coin flips.

26 Dec 2021

Top ten ways to destroy coins - Part 3

| Stan McDonald - author

Whizzing is the process of cleaning a coin with a brush and water. A whizzed coin has swirl marks from the brush strokes. Tilting a coin into the light reveals brush marks.

20 Dec 2021

Planchet Errors Part III

| Stan McDonald - author

Planchet errors include underweight coins, or the thickness is not the standard. Below is a 1945-S Lincoln cent that weighs 2.9 grams versus the standard 3.11 grams.

19 Dec 2021

Planchet Errors Part II

Coins | Stan McDonald - author

Planchet errors include split planchets. Planchets can be defective and partial before entering the minting chamber producing distorted coins less than the standard weight. Planchets can also split during the minting process, producing an underweight coin. In some cases, the pieces can detach after the strike, and both pieces are in a mint bag or box. PCGS grades coins with split planchets as before or after the minting process.The first photo is a Jefferson nickel with a split planchet before the strike. Note there are details on both sides of the coin. The second photo is a Nickel with a split planchet after the strike that broke apart in the minting chamber. Note that there are no details on the coin since this part fell away. There are cases where both pieces have been recovered and encased by the grading services. The last two photos are ordinary (worthless) cracked planchets produced during the minting process.By: Stan McDonald - Author of the number one error coin guide and numismatist

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