1990-D Doubled Top Of Columns ?

I agree, it looks like typical Machine Doubling on the columns.

Thanks,
Bill

Okay, I chucked into the recirculate pile, just couldn't leave it there. Took a couple more pictures. Just don't see the flatness like on Machine Doubling. Appears to be rounded and even seperated from the column. Maybe my equipment is letting me down on this one ?

MD to me, too. If Bill and Chuck think so, you just about take it to the bank.
JIm

In looking at the shape of the doubling versus the primary column, the shape of the two are different. This is an indicator that part of one piece was flattened to create two. That's Machine Doubling. In this particular instance it appears to be more double struck than a simple case of die chatter, but both are so close in occurrence and appearance that they are often pooled into the same definition.

All forms of Machine Doubling are essentially the same in appearance, but minor hints show the differences between eject doubling, die chatter, and Strike Doubling. The only ones that have true value are the ones that are strike doubled with a significant rotation between strikes so as to make the whole coin very oddly doubled with details where they shouldn't be and other details missing where the second strike flattened the first. These are more commonly referred to as 'double struck in collar' and bring a decent premium - but the mechanism that causes these is the same as with your coin.