1947-S LWC Partial S And Poss. Doubling

That very well could be! I wasn't actually thinking of doubling on the mint mark, more IGWT/Liberty, but I see what you mean now comparing it to the date.

I'm still getting my bearings with doubled die & mint mark errors for sure, hoping to learn more now that I can see better. I found at least one RPM I'll try share tomorrow as well, I'm torn between whether I have a match or not.

Still curious what causes the partial appearance of the S either way, haven't noticed that before. Just a poor punch?

Looks like Die Deterioration Doubling with perhaps some MD to me.

I'm thinking Machine Doubling and a Grease Filled Die issue on the mint mark.

I agree on the MD.

The top of the mm could also be abraded partially from the die polishing. If you look above the date, you can see the weak outline of the wheat stalk clash. In properly aligned dies, the tip of the wheat stalk is below the first "T" in TRUST, and the tassels of the wheat stalk run through the third and fourth digits of the date. The mint marks were hand-punched into the dies and are (naturally) shallower than the date, and therefore easier to abrade, especially on worn dies. Your coin shows heavy die polishing through Lincoln's vest and the lower date to the rim, probably to remove the clashed impression of the tassels.

Again, thank you everyone for the firm consensus - very helpful!