With that significant amount of letter change it would certainly be a keeper. DDD usually adds no value, but yours is so pronounced that I'd be surprised if you couldn't get a couple bucks for it.
Sorry but it Machine Doubling. These devices on the ATB Quarters are incuse. Raised on the die. So it is were DDD the devices would be even smaller than normal size. On incuse devices the die would have to have raised devices. So die polishing would make the raised devices on the die even smaller. 70% of the ATB Quarters have MD. Whether minor or major. Very common to find enlarged devices because of the Machine Doubling. I've yet to see an example of hub doubling on the incuse devices on a ATB Quarter yet.
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