1983 D Lincoln Memorial Penny Weight 2.9

I'm learning from you guys and on my own don't get me wrong I do a lot of research like error-ref. Com coppercoins varietyvista etc but also is good to heard from you guys opinion like SPENCE and Dearborn also John1 and most of you guys and here are more pics. About my scale accu.




First pic a 1983 D zinc cent
Second pic. a 1973 D copper cent
Third pic 2020 D shield cent

Me I see signs of plating coin. Electronic scale to calibrate is not easy. Me still use as back-up and confirm an Goldsmith Diamond scale.

May I can see the sides of the coin? Could be also an thicker planchet.

@4q, ok looks like you have an oddity here as it seems to be out of mint tolerance. Probably worth storing in a 2x2 until you know more. Can you please post a good closeup of the mintmark? Thx.

Common zinc cent with plating issues.

I will not use the word 'common' zinc cent cause the 2.9 weight is not 'common' and yes I storaged this cent in a 2x2 thanks spence
I read Numismatic News sometimes it has an article about this copper zinc plated cents

@4Qeens: To be clear with you. I know about what you parallel from Ken. I know when he talk about. Your coin has the blisters.

BUT, the best way to see exact, it is to go to most close goldsmith store and ask for an XRF which will show the coin material composition. After bring us the result. Thanks.

Don't get caught up in the weeds with math and other things like that. Your pictures aren't great and it's definitely impossible to determine zinc or not. I've found less is more when shooting a coin. HD will always make it look horrible, unless you're a pro and know exactly what you're doing. Most of the participants are extremely knowledgeable and will tell you exactly how they see it. I value their insight immensely.
It may help to understand the environment as I've understood the forum over time. It is extremely rare to see certain coins. (Retirement Coins) There are multiple "potential" posts daily, essentially creating a poor environment to find positive forward momentum if you really do have something. There's a reason for this, you can't give everyone that possibly finds a "retirement coin" all the hope in the world just to appease them for a day. That said the advice is usually sound.
Make sure you're scale is accurate. After a little bit of practice you can easily tell zinc from copper with a loop. XRF sounds like a good idea. Surefire thing is to take it to a local pro. I hope you have found one of the rarest coins out there. Good luck.

This one might challenge your method Coop.