Thanks for your help in advance, I'm new to posting but have lurked this forum for awhile. I've never found a double die coin but I think I might have with this coin. Here's a picture
Welcome to the forums Earl, Need a bit bigger picture I can't tell from the one posted. Is the doubling flat and shelf-like?
From what I can see it looks to be machine doubling. Here's one place to learn a little more about the types of doubling.http://koinpro.tripod.com/Articles/OtherFormsOfDoubling.htm And welcome to C.T.!
Yes, welcome aboard. This is one of my favorite sites illustrating Machine Doubling (MD) vs Die Doubling (DD). http://www.coingalaxy.com/coininfo/doubling.html
So this is not HUB, repunched or HOB but strike doubling also known as maschine doubling? which is considered damage by some people? Is strike doubling or maschine doubling still uncommon or worth sending in to be verified? What would this be labled if verified by PCGS? I had no idea of the differn't types of doubling its awesome, this is why I love this hobby its so exspansive. Also its exspensive but thats why its the hobby of kings. Also thanks for the links those are amazing sources of info. Thanks alot.
Machine doubling is very common and unless it's severe is not considered collectable by most folks. It would be a waste of money to send it to PCGS.
If you think about it, hubs are used to produce dies which are used to produce coins. So a hub (or "working" hub) has the same relief as the coin. Raised devices are raised, recessed areas (if any) are recessed. On a die, the relief and left-right orientation are switched. Roosevelt faces left on the die and right on the coin, and the raised areas on a coin are recessed on the die. This makes the production of deep-contrast proof dies, for example, easy, by polishing to produce mirroring in the fields while leaving mint frost on the (recessed) devices. Now, the production of dies requires more than one strike from the hub, and in-between the dies are "work-hardened" or annealed by heating. If a die is struck (more than once, between work-hardenings) by a hub that is not perfectly centered, it will produce a doubled die. If a die is struck by a 1909-dated hub and a 1908-dated hub, it will produce a 1909/8 double eagle, same principle as the 1942/1-P and -D Mercury dimes. So most overdates (from the modern era) are actually classified as dual-hub errors, where the Mint personnel grabbed differently dated hubs between the various "work-hardenings" or annealings required to produce a coin die. (In older coin series, such as Bust halves for example, the Mint workmen would indeed take a die and reengrave the last digit to change the year, often leaving traces of the underdigit. This was a manual operation not involving hubs.) Strike doubling is sometimes called "bounce doubling" for the rebound "bounce" that a die will make in striking a coin. And it is quite common. Hope this helps a bit. There are many experts in this field, and I am not one of them. But I hope I can explain things fairly well in laymen's terms.
