Hi Harper1249 --
First -- let me say that you are not even close to "wearing out your welcome mat" -- as I very much enjoy reading your posts, looking at your stamps, and helping with your plating efforts -- so, like Classic Coins said -- keep 'em coming!
Nice job on plating the 91L8 -- which is confirmed as correct.
Couple of comments in response to your questions --
-- The doubling of the LFL is exactly as you suspected -- the faint line is the LFL as engraved on the master die and ultimately transferred to the plate when the position was rocked in -- and the heavier (i.e., "recut") line was so far off that that both lines show on the printed stamp. As an aside -- it was the very faint transfer of the FL's that drove the need for all of the recutting done by TCC -- and this position is a good illustration of that. The originally transferred, weak LFL is difficult to see in the Chase photo due to its quality -- and also a bit hard to see on the Lund stamp due to what looks like a smudge of light soiling (???) in the left margin -- but under high magnification it is there. I am also attaching a copy of my 91L8 -- which shows the doubled LFL better -- and is a solid match to your stamp in all regard.
-- On that possible "recut" you noted at the UR corner of the LRDB that extends north toward the LRT -- I agree that it is not visible on the Chase or Lund copies -- and at first, I thought it might have been a bit of stray inking -- BUT -- it also shows, albeit to a lesser extent -- on my copy of 91L8 (see scan attached). IMO there is a bit of a deeper spot on the plate at the UR corner of the LRDB -- and as the plate wore, the dark spot became more pronounced -- and in the case of your stamp -- there is also a bit of stray inking protruding up toward the LRT. In any event, for what it is worth -- I confirmed the Lund copy of 91L8 as being correctly plated as well -- so, my opinion regarding the differences we are seeing at the UR corner of the LRDB is that they are attributable to a combination of differences in inking, impression, and plate wear.
-- Too bad your stamp is cut in at UR -- otherwise the top margin is wide enough that the GD from the adjoining 81L8 above would have shown -- and probably saved you a bunch of time nailing this one down

.
Regards // ioagoa
