1990 cent with unknown reverse markings

just came across this one. On the reverse, there are what look like 2 thick raised lines going from the top right of the memorial down to the "C" in cent. Looks like die clash marks, but they don't match anything from the front. Any thoughts on what it is?

 

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If those are all raised metal, and not part of a clashing of dies, then maybe feeder finger damage?…or maybe some kind of plating issue…imo…Spark

 

They are raised. If the first picture, you can see that it spans almost the all the way from the edge to the memorial, just much more faint.

 

I was thinking of small plating blisters and then I saw the date of the cent in question. It’s zinc so my thinking was correct. Just common plating blisters.

 

I would strongly disagree with that. Zinc blisters are much more rounded and random. You can clearly see these markings are stamped, squared off, and follow a linier path.

 

Odd placements but they have the look of feeder finger marks So I'm with Spark for now.

 

I was thinking feeder too, but wouldn't those be visible the entire length and not fade in and out?

 

Feeder fingers would cause depressions as they move over the top of the coin and possibly push raised metal to the edge of the mark , not isolated raised areas.Raised areas are from damage, wear, and tear of the die causing chips , breaks, etc. IMO, Jim

 

Well if the die was damaged, and that is usually what causes these, then they would be raised on the coin, gouged from the dies.

 

I don't want to be negative, so I won't comment on anything that required high magnification to see.

 

Visible, even without magnification. The C looks like it has a unicorn horn.

 

It's die damage, specifically a series of die dents.