I'd need to see a better image of the date, and also an image of the whole coin, but I think that's machine doubling and not die doubling. If that's the case, it's worth a couple cents.
Looks flat and shelflike to me. Not a Doubled Die IMHO In the 9 and 5 it looks like they have slight Die Chips. Maybe worth $1.00 for that. @Rick Stachowski
I believe the mint mark was punched in after the die was completed, so the mint mark would not be doubled on a doubled die.
How about a image of LIBERTY . Check the variety sites, before you take any images . On this year, all the dates are taken -plumb . http://varietyvista.com/01a LC Doubled Dies Vol 1/DDO 1957-D.htm
Do you by chance own a loupe or magnifying glass? I need a close up of the date. I’m leaning towards MD.
Yes, it is similar , but it is also not a DDO and IMO worth a dollar max. That one and yours shows Machine Doubling, but on the good side you can compare, but use www.coppercoins.com or http://www.lincolncentresource.com/ I generally find that less than 1/3 unslabbed cents on eBay are not what they say, any doubling, but most are MD are called or implied to be the real DD. Jim
Most of the old timer variety seekers on the forum could make a lot of money if they didn't have ethics, didn't mind exaggerating ,or outright telling lies, or didn't mind being called bad names and threatened with lawyers and advertising on ebay ( until kicked off), etsy, etc., by selling their many MD coins or damaged coins. it takes time and study, but someday it will hit you, that you know what people are talking about and go to local coin shows and know who are the 'good' dealers and who are the shams. Jim