1969-D Jefferson Nickel (Beauty)

Hey everyone. This is my first coin-post on the forums and wanted to share this 1969D Jefferson I just found in a mint pack. There are only a few noticeable dings on the coin itself. Most of the scratches seen in the pictures are on the plastic cover because the edges on this thing are deadly.

The fields on both sides move around in a silky way similar to a '65 sms, and the edges are sharp, highly reflective, and have a golden tone and rim. For whatever reason, the obverse lettering and the Monticello's dome also received the same toning, giving it a gold/silver cameo-like effect. Because it is slightly off-centered, the rim around the obverse sinks into the field evenly at the bust, with the gold blending into the jacket and the artist's initials stopping abruptly at a squared-off edge. I think it's quite beautiful.

The first thing I noticed however was the (MD?) in much of the reverse, but mostly in "STATES OF AMERICA" and also on the right-end of the Monticello building.
Because this was a difficult year for nickels, I was wondering if this was actually caused by MD.. or is this the originally intended look of a '69 nickel?
And if it is only Machine Doubling, could it be due to the off-center strike it had received?

Anyways, I'm a newbie here and have much to learn, so I look forward to your feedback.