Is This A Rockwell Test Mark? Or Is It Even Possible On A Dime? (2015 D)

I'm not being argumentative or nothing like that I totally agree with you it's just kind of suspect I can't get a picture of my phone but the actual copper core is a different off color than usual my phone's so frustrating with pictures if the hole is bigger on the front side then the dimple on the metal should be protruding out the top side just like if you use a metal punch on a piece of steel that doesn't dimple out the back always equal an opposite reaction no matter the backing

Got it one chance to give you all the info I know and forget it if someone may be mistaken in a answer this is not a place for discussion or replay one more thing it's hard to tell but the dimple is actually almost completely flush with the coin surface when you compact metal it changes its density when it struck the press has to use less pressure to push down the dimple then the other parts of the coin because there's no metal behind The dimple it makes little imperfections stand out different than other parts of the coin because of the density and different striking pressures the letters are all there if you used a punch to make a dimple that fine you would not have the letters cuz you would have to use too hard of a surface do not distort

I come back to this post just to specified something to all.

Any coin with mark like Rockwell test are complete simulations of the test, better say FAKE.. The main reason it is : This test is perform on planchet and this because the mint must be sure that the future coins can support the forces of the strike. Those test are done in Lab before strike and not after and no test planchet will reach the production line, which it is almost impossible.