Possible 1982 double die reverse...

[Tcat1113]

there's a solid line next to all of the letters

[jcuve]

Some machine doubling...

[enamel7]

The doctor is in!

[Tcat1113]

I'm trying to post another better picture

[Tcat1113]

here's another picture of those solid lines running a longer letter

[GrumpyEd]

We always say machine doubling is into (or takes away) from the normal design.

Look at the vertical bar of E in your top photo.
Where it has the MD at the top, the normal vertical bar gets narrower. The MD made a shelf into the normal part.

A doubled die doesn't take from the normal parts, it's something extra along with the normal design.

[enamel7]

More pics won't help, it's simply md.