2.9 g 1942 penny

This penny weighs 2.91 grams . The width is normal. I have a 1917 wheat cent in far worse condition and it weighs 3.03 grams. Is this 1942 a lamination, grease , or planchet error possibly? Thanks

 

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Your coin appears to be a normal business strike with some minor environmental damage a normal copper Cent ways 3.11 or a +/-.13.
Dave

 

The wear and damage would account for the rest of the minimum