I also think
PMD. It wouldn't be a
DDO, it would be a RPD, unless you see doubling somewhere else. I tried to lighten and sharpen your image a bit but it still isn't great. Something hit the coin, taking off the top of the 6 and splitting the lower part, pushing some of it to the left a little and straightening out the inner loop, and pushing a little tip to the right, causing the illusion of doubling. That's how I see it.
