Misidentified Plate Number? Re: Scott #20 In Siegel Sale 1247

The image below was downloaded from Siegel's website, and is of lot 56 in sale 1247. Siegel states that it is a Scott #20 from Plate 4, and calls attention to the fact that top row of Plate 4 produced Type II stamps with the design complete at top. It looks to me, however, and almost without doubt, that there is a "secret dot" in the frame on the left. This would mean that it has be to be from either Plate 11 or Plate 12. The entire top rows of both of these plates also shows the complete design. The plumes at the bottom are less complete on Plate 12 than on Plate 11, and I believe that they closely match those of Lot 56. The guide dot, which is tangent to ornament "Z", appears to match best with 3L12.

The Scott value of a #20 from Plate 4 is four times that of a #20 from Plate 12, so it's an important distinction one has to make.

widglo, I think 2R12 might be a better bet for the specific position, but you are spot on in your identification of this stamp as not-Plate-4.

I agree that does look like a plate 12 A relief, top row. Certainly not plate 4.

The tall, or wide perforation setting on it highlights the design even better than usual.
These are sometimes found mostly in top or bottom row stamps.

I've been looking at top row Plate 12 stamps, and I came back to look at this one. I think now that it is 1R12. Neinken doesn't show the guide dot on his map, but the examples on the StampSmarter database (documented with the centerline), show a guide dot, and it in the same position as on this stamp. The blurs in the left margin are also consistent with 1R12.