Cents minted after 1943 were made of Copper Artillary Shell casings for a few years.1944 - 1946 Different composition - The shell cases were 70% copper and 30% zinc. Let the attack on my comment begin!
Photos of both sides of the entire coin would be helpful. From the photos you posted it looks like someone cleaned it with a fine wire brush or something similar. If the lines were on the planchet before being struck, I don't think the lines would be on the devices.
OK! Most of the shell casings were 50 caliber shell casing not artillery, and additional copper was added to the melt to bring the overall composition back up to 95% copper 5% zinc. So the shellcase cents were not 70% copper 30% zinc, they were nearly the same as the pre-war composition. As to the lines seen in the first images, I would suspect planchet/roller striations. Note the lines run straight across the coin on both obv and rev, and they are on both the fields and devices. The line are running on the obv from top left to bottom right. Now the lines run the same way on both sides of the strip, but when you flip the coin for coin orientation the lines will now be running from bottom left to top right, just as they do on the OP coin. I doubt someone with a wire brush would get the lines straight and running in the proper direction on both sides of the coin.
Hello @Serena Barabas I see your Cent. In my opinion It looks like some kind of corrosion caused after the Cent was minted. When it was in circulation. I see you are new on CoinTalk. I suggest that you create your own unique threads. Keep your titles simple and keep posting those great pictures. Suggestion.. Create them at the Error Coins forum and not the Whats it worth forum. Many new collectors are more concerned about value than trying to first find out what the issues on their coins are. Many true minor error issues actually have very little or no premium at all. Welcome to CoinTalk
Military dictionaries online say from machine guns down in caliber are 'guns' , larger than MG is artillery. I believe the next highest in common use is the 20mm cannons which would be 0.787 cal. if they were measured as such. Jim