You may want to check out this thread for help https://www.cointalk.com/threads/1941-lincoln-wheat-on-a-foreign-planchet.320012/
Do you have any compositional analysis data like XRF or SEM/EDS? After almost 80 years in circulation, it's impossible to visually determine the composition. You should be able to find a lab or university that will do this for you. If the composition comes back 88% Cu, 8% Zn, and 4% Sn, then you may have something. But without the analytical data, it doesn't matter if you're the leading error expert in the US or the head of the Material Science Dept at MIT, it's just an opinion. Hope this helps
Hello all, I did take a picture of my coins to compare the color between 1941 and 1956, both are copper (at least is what I think), 3.1g and cleaned using only acetone. The result of comparison can offer some help to your conclusion. The 1941 coin seems tonning more yellow than the 1956 coin, although the picture be poor on showing the true color of the coins. The yellow is more intense on the 1941 coin that picture can shows. Forgive me if I'm being inopportune.
Not really, but you need to understand that appearance alone is not enough to make a decision. BTW, cents are not copper, they are bronze, since the mix contains some tin.
What I tried to say was the color of my 1941 bronze wheat penny composition is the same as both coins presented here by @ShadyCadence and @Stevet (at least is what I guess). So, if the only way to know that coins are diferent is the composition (because the color is the same) we always need to make an analysis of coin composition. Am I right?
It's almost 100% that your coin is 95% copper and 5% tin and zinc. The color of your 1941 is not a great barometer. Copper coins can get that color from cleaning and not toning. (I'm not saying you cleaned it, it could have been cleaned long before it reached you.) People used to clean their coins, and even circulated coins could have been in a fountain at one time, hotels will often clean the change so they don't give out filthy coins to their guests, etc.
The color is an indicator, but "The proof of the pudding is in the eating" if you want to sell it as an off-metal error, it has to be authenticated.