1851-57 12c Washington

An image for consideration. Not a very nice stamp, however who knows if it might add to the data being collected. Looks like a guide dot on the lower right.

The upcoming Paradise Valley Auction has a nice strip of 4.
https://www.stamp-one.com/stamps/pv/s122/87753.jpg

Chipshot, not enough detail to plate that one. Enlarged image is blurry.

Harper, Thank you. That strip of 4 is 63-66L1.

That strip of 4 gave me two more spacing images. Only one left. However, Neinken has appeared to have made two errors. Spacings 1-2 and 3-4. He calls both "even to slightly higher and in both cases, they are slightly lower. Should I leave the text as Neinken called it or should I change it?

Here is a pair from my collection, columns 9 and 10.

Yea, I see what you are saying. If that is consistent (as one would expect) across all of the column positions that you can find - so you are sure this isn't a one-off, then clearly, make the change. They are close, so the 'even' word probably still applies in addition to 'slightly lower'.

If the descriptions are based primarily on Neinken's research, then I would recommend a thorough paper trail of the change so that future scholars note the correction, rather than them possibly concluding an error was made in transcribing Neinkin's information if just a correcting change is made. For example, I would would write. Neinken labeled this in error as "xxx", but closer examination shows it is actually "yyy".

I think I got all the information for my 12c plating program query.
I will need to figure out that spacing issue for 1-2 and 3-4 to gather my information correctly. Then I need to answer all of these questions for all 200 positions. Any thoughts?
Here is how the page will look:

Here is a strip of 3 showing 6 guide dots and the spacing of the stamp before and after it. With the first stamp having a guide dot above the inner frame line, it was easy to plate. It is position 22-24L1. It shows the spacing 1-2L and 3-4L that are in question. They both match the images that I made for my spacing chart showing the second and fourth stamp as slightly lower not slightly higher as Neinken stated. Look at the strip and then the spacing chart shown here. The top images are what I had and the bottom images are from this strip.

Here is an improved image of my earlier posted stamp.

I am thinking 39L1 might be the position. I also think the line in the O of postage might be confirmation.

Chipshot, it is not 39L1. The guide dot on 39L1 does not touch the outer frame line. Your stamp's guide dot does touch the OFL. Looking at the image posted, it does line up though (see bottom images for guide dot alignment). 61L1 looks like a good match but the guide dot does not line up. I think it is 28L1. The guide dot touches the OFL and lines up. As far as the dot in the "O" of "POSTAGE", all stamps have that mark. I originally thought it was a plating mark too but they all have it. 28L1 also shows the upper left corner as weak.

Thank you very much for the time you are spending for me and for all of those that are interested!

Rslny, this is one of your stamps. It took a bit of searching to find the match. It has a lower right guide dot as well as the stamp above. On this stamp the guide dot is on the OFL and the stamp above is inside the frame lines. The stamp to the left is significantly lower. This points to columns 3 and 6 on the left pane and only column 9 on the right pane since column 10 has no guide dot. That narrows it down to 24 positions. Also worth noting is the top left corner is over extended on the stamp and the stamp above is over extended in the lower left corner. From those 3 columns, the only spot that matches the two guide dots and the extensions is 23L1. That is a positive match.

This last stamp has prompted me to add a new section to the plating query that I am working on. I added the section for "Stamp Above LR Guide Dot". A look at the new query sheet shows 4 selections that would give the result of only 23L1. It is possible that 3 of the 4 selections would pin point it.