Note With Stamp Sc#579 Not 595 Can You Tell What It Is

I scanned these earlier and think I put them away had an ant attack had to deal with. If you see one there are more sure enough, but they are raid'ed and gone. Now where was I. I wanted to find out more on these two stamps I found in a glassy with this note. Anyway lost my train of thought posting just for a look.

There are two stamps the first one scanned a single, then the stamp on paper with the note and it bigger last.

I believe they are rotary- they were a little bigger then my flatplate template.

I measured the perfs, they seem to me to be 11

LarryBruce....
a #579 is perf 11 x 10.
Stamp looks to be #634d....
from booklet pane.

To elaborate, booklet panes were printed with the paper grain going the other direction. This causes booklet stamps to be wider. They won't measure as wide as a corresponding rotary printing, but will be close.

Does the date on the postmarked stamp on the piece of paper correspond to the booklet type? Dec 4th postmark before the date of the booklet? They have Dec 10th on the 634 and 2/25/27 on the booklet in catalog/or am I reading it wrong?

I just measured these again the single one seems 11 x 11 ?
I dunno I am not great at measuring but tried to make pictures here they are.

The dates don't necessarily matter. Both are very common booklet stamps.

The measurement that would be different for a booklet stamp would be "left to right" overall measurement of the frame lines. Perforation measurement is not a factor.

Generally, if it has a straight edge at left or right and is "wide", then it is a booklet stamp which is very common. Rarely you will find a stamp that is very "wide" and the measurement is 19.5 mm or greater. Please note that it takes very accurate measurement tools to make the distinction. Calipers accurate to one thousandth of an inch are good. Specialty gauges such as the Precision US Specialty Multi-Gauge are very user friendly.

For your situation, you can just note that both are booklet stamps and that is why they are somewhat wider. If you can accurately measure them as over 19.5 mm wide, then they could be coil-waste and valuable but I highly doubt that yours measure so.

Does look to be over 19 on this mm ruler as near as I could tell with my eyes.

So what booklet Scott number would these be?

Scott 554c single (for perf 11, which both appear to be.)