US Stamps 1 Cent Washington-Franklin Pref 11x11x11x12

i have a question on this stamp, this stamp has strange pref of 3 side of pref 11 and only one side on the right side is pref 12
i use stamp perforation gauge to measure.

can anyone tell me what scott numbers this stamps is ? and how much it value might be ?
i study on many web about this stamp with this strange pref but can't seem to find any .

preforation are not off , look at the picture , right side is exact pref 12

Your perf measurements are off, here is a good site to help you.


http://www.stampsmarter.com/1847usa...rankmain.htm

Right side looks reperfed to me. Perhaps someone was practicing their reperforation skills on a common stamp?

if the stamp is re-perforated then the stamp length and width would be short , but this stamp match length and width of she same kind of stamp that I had. so it is not re-perforated for sure as far as I know, my be it is a new discoveries stamp ?

While less improbable the stamps are easy enough to explain. I am still looking to complete the matching set.

Correction: Perf 11x12x11x11. Whatever it is or is not, I hope other posters would just no or say nothing. Maybe the latter would be more effective.

tokgae -

Since the sequence was from perf 12 to perf 10 and then to perf 11, finding obsolete pin spacing almost a decade later highly improbable.
You would do better denying evolution, climate change or gravity than making a case for a nonstandard wheel in a perforating machine. The only documented case, where some approximately perf 10 pins replaced normal pins in a perf 11 machine, is fully described in the "United States Specialist". The article is online, accessible from the United States Stamp Society web site.
Clark

Although the color looks gray-green to me, I suspect that it is the middle-right stamp from a #498e booklet pane, re-perforated at right.

This is an offset printing, Scott 525 perf 11 on all four sides.