I have a wheat Lincoln wheat penny that weighs. 2.7 gram same almost my 1943 steel cent.

So first pic is my steel cent and the second pic is my wheat cent. And the third pic u see the steel penny stuck to magnetic

 

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First, welcome to the neighborhood!

Given the condition of the second coin, I don't think it matters.

Chris

 

Because it has been severely corroded which has removed enough material to reduce the weight to 2.7 grams

 

1. Your scale isn't accurate enough with just 1 digit after the decimal as it is a rounded digit.
2. Weight and tolerances only apply in general to non-circulated coins as wear/damage reduces it, corrosion adds to it.

Yours shows definite corrosion from an acid type solution.

Jim

 

Or reduces it if the corrosion products do not adhere to the coin.

 

I also have 2 1943 steel pennies in good condition that weigh 2,7 so why is that if corrosion isn’t s factor?