1940-S Jefferson Nickel Struck Through

But what did it weigh when it left the mint. Coops on the case. Nice coin!

I joke because this small of a lam would not weigh anything. But not joking about a nice coin and error!

Very nice! Looks like a LAM to me as I think I can see it continuing up the coin lightly.

-CH27

I would say lam but nice whatever it is!

The Weight Tolerance of a Jefferson nickel is 0.19 g, or about 3.8%. A small lam like that won't affect the weight enough to be detectable.

The reason I lean towards a struck through it this: On a lamination issue, the stock at rolling time maybe in the cooler temps at this point, so any debris rolled on to the stock at this point will press it on the the metal, flattening it making it longer.



Thus on coins the lamination appear longer in shape and most times extend across the coin. On this one, it is short and thinner. Even note that one part of the metal was even more thin. But most of the time a struck through will be thicker and it blocks out the devices totally. When the strike through falls off the coin, then there will be a void. But on this coin, the debris was very think. Allowing the ghost image to be retained. Thus because of the small size, I feel it is struck through debris issue rather than a lamination issue.

It's hard to imagine how a strike through debris could obliterate part of the building, yet have only a minimal effect on the letters. I think it was a lamination defect that broke off before striking, leaving a void that partially filled in when the coin was struck.

The building is thicker than the fields.

Loving this debate! At the first I thought lamination simply b/c it looks like one at first glance. But after thinking about it I changed to strike through. The uniformity is just not what delam errors exhibit and a thin foreign object would theoretically make something look like this. The object also would not necessarily have to have uniform thickness so one area could be deeper than another.