Okay I know it’s worn a lot but if you look the 4 has a slight double above it and the 2 has a small trace of the 1 This is common on a worn coin
That isn't the same coin, the OP's coin is a Denver minted coin. Denver has an overdate as well and is much more subtle and harder to see.
Not a 42D over 41 over date. Looks like some minor machine doubling at best. Remember, the over date is part of the die, which means all of the coins struck by that die are going to look the same. Close = you don't have it. If you believe you found a new variety after 80 years of people searching for these overdates, it would need to be authenticated by a TPG. However, my recommendation is that you save your money.
Folks: You are automatically saying no, however, this is a D.. It could be, but I'd need a clearer picture of the date to be sure. I cherried one a number of years ago - which every dealer I showed it to said nope. Now in an NGC holder. F-12 as I remember it.
It is not an Error. Take it from me. I was pretty SURE I had one. I sent it in to be graded and slabbed at a total cost counting membership fees, insurance, mailing costs, grading costs. I was out $153.00 and mine was just a nice Mercury dime now slabbed. Most of the guys in here said NO NOT ERROR, hard headed me tried and failed anyway.
The coin in the original post is not the overdate. The 1942/1-D is more subtle than the Philadelphia version, but every example must have the tail coming off the bottom left of the 4's stem, and the smaller tail coming down from the left of the 2's base. They may be easier or harder to see on some coins, but those features must be present, and in exactly the same position and orientation. Your photos are clear enough to show that they aren't there.