First, welcome to the neighborhood! I can't tell from those photos. Try taking the images from directly overhead, crop out the extraneous background before resizing the images and be sure to select "Full Image" instead of "Thumbnail". Chris
Do you think it's fake? Why do you think so? Where did you acquire it? What does using a magnet have anything to do if it's real or not?
Standard weight appears to be 26.73 grams (Redbook). At 26.9 grams, the OP's coin is 0.17 grams too heavy; if 0.26 grams too heavy, that would be 1%. You're around 0.6% too heavy. What kind of weighing device did you use, and what's its accuracy? Have you tested the weights of other types of coins against standard weight?
Yours seems close enough but I would expect it to be a little under due to wear. Is there gunk on the coin? I would do two more things. Weigh several other dollars If you can on your scale and see what you get. Also measure the diameter with a caliper. It should be 38.1 mm. I've not had luck with the magnet test.
Regarding a magnet test, this is how I do it: now it isnt always definitive, but I use a neodymium magnet that is 1"x1"x4". It is very strong and a little dangerous around iron lol. I set the coin on one one side of the magnet and tilt it slightly until the coin slides down the length of the magnet. Once the coin reaches the end of the magnet and is about to fall it "sticks" slightly to the end of the magnet just before falling off. If it hesitates like this than it is probably a real coin. If a magnet is strong enough the silver coin will react somewhat like this: I know that is a copper pipe but silver and gold will react kinda the same way. If you want to do magnet tests on something other than 1943 cents, you will need a really strong magnet, kitchen magnets wont do.
I think it might be fake- here's why: Look at the letters of ONE, the O looks mis-shapen. The N looks way too fat. The E, bottom bar crosses over and is on top of the eagle feather. Its supposed to stop, at it, not be lying on top of the feather like that. To me, the word peace is in extremely high relief, like one would expect to see on a '21. This isnt a deal breaker in and of itself, just another strike against. Lastly, the rays between the legs and tailfeathers. There's supposed to be 6 of them. I count 7. Wassup w that? Now couple all of that, with the fact that it weighs .2 over (roughly) AND its circulated and i believe we may be looking at a counterfeit. Now i dont avidly collect Peace dollars, i have only a single '27p choice Unc in my collection. So, dont take my word as gospel, form your own opinion. BTW, where @Insider ??? Hes pretty good w this sorta thing
I polished it with silver polish and it came off so there is silver in it so not sure what is up with it?
It's a fake. The coin is cast from non-magnetic metal alloy that is a different specific gravity than 90% silver. That is the reason it's thicker than authentic coins. They (chinese counterfeiters) attempt to reach the correct weight using this tactic.
There are some of the fakes that are junk metal composition with a silver plating. Could explain why some silver came off with the polish as well as the weight discrepancy. Just a thought.
The only one I can confirm as fake by these pictures is the 1925. I count eight rays under the tail feathers and letters of ONE are totally off as previously pointed out by another responder to the post...Way too thick. Possibly pictures taken more straight on might help with determining the authenticity of the other two.