1983 DDR Or MD X2

Ya, I understand it, but this seemed to coincidental to be just MD. I thought MD was isolated to a specific moment in the mint process?

Specific moment - during the striking of the coin. True statement. But that doesn't mean thousands of coins with similar Machine Doubling cannot be struck the same year.

Coin-to-coin with Machine Doubling simply means that one coin CAN be machine doubled and the next coin CAN be completely normal. It's not the rule. There could be ten thousand coins struck by a loose die before it is properly tightened, and every coin struck during that time could have some degree of Machine Doubling. The difference is that the die is completely normal all the way through that process.

A doubled die is doubled. You could see the doubling on the die itself, so EVERY coin made by the die would be doubled.