What Causes This?

RKKay

Have Star #1 and the area below "N" in ONE been exposed to some acidic liquid? Thanks for your help. This is definitely at a die level. I've seen it on more than one coin. Thanks for your help!

Unknown

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RKKay

Thanks, but not mine.

Insider2

Hard to tell for 100% on an unmagnified image. The lower line from the star looks raised and continues into the star point so possibly a die break. This can be confirmed if the same thing can be seen on other coins.

The upper mark is wider and looks to be into the surface. Die flaw? It is unusual to see a flaw and a break from the same die detail (star). This could also be a corrosion streak but corrosion is usually a spot on these pieces.

davewesen

acid etched or rust? the star has some pitting/toning/pvc? that can be seen if blow up pics

Insider2

@davewesen said:
acid etched or rust? the star has some pitting/toning/pvc? that can be seen if blow up pics

Great image. I would guess that rust marks usually should not flow in the direction of stress, but it could as that would be a worn part of the die. The lower mark still looks raised.

davewesen

pattern dies with wear? they probably have less than 50 strikes total.

RKKay

Thanks for your legwork and thoughts. I appreciate it.

ricko

The anomaly below the N looks to me like a die chip.....I do not know what causes the marks by the star, but the 1 also has it on the left side... Cheers, RickO

RKKay

@ricko said:
The anomaly below the N looks to me like a die chip.....I do not know what causes the marks by the star, but the 1 also has it on the left side... Cheers, RickO

Thanks, Rick

Insider2

I think it is a centering dot.

RKKay

@Insider2 said:
I think it is a centering dot.

The dot in the center of the reverse is actually a die clash from the ear of the 1854 Coronet one cent pattern
(J-160/J-161)