Us-1c-Franklin-P11x11 - Scott Number

Hi,

Perf stamp at right is 11x11. What is the scott number?

Height look near than a coil stamp P10 verticaly.



Thank you!

CDNum.

This stamp is available in many different perforations. What comes to mind is Scott 552 (flat plate) or 594 (rotary press) for the Perf 11. The Perf 10 Vertical is probably Scott 597.

Hi Partime,

How to detect Rotary Press? Seem to be very difficult... Is the right one can be Rotary stamp?

Thank you!

CDNum.

The stamp on the right it SC 552; the coil stamp on the left is WIDER than the flat plate, not taller.
If your stamp on the right were as WIDE as the coil stamp it would be SC 594.
If you measured the other coil stamp, SC 604, you would find it TALLER than either of these.

Hi Chasa,

Is scott #596 wide is like scott #594? I don't think but i'm not an expert.

Thank you!

CDNum.

596 is tall like the 603 coil.
594 is wide like the 597 coil.
552 is like neither coil, it is narrower than 597 and shorter than 603.
it is the same height as 597 [as your picture shows] and the same width as 603.

Thank you Chasa :-)

or use the tin foil trick.

Hi,

This one is my taller 1 cent Franklin P11x11 (but not the most beautiful :-)



There is something write on the back.

I_Love_Stamps : What is "tin foil trick"?

Thank you!

CDNum

Hi,

Questions to specialists :

What cause excess ink like that on a stamp?
Is it come from printing method?



Thank you!

CDNum

Hi,

I asked question last year about some extra ink on this stamp. Is it coming from press plate (flat, rotary, etc.) or not? If not, what cause it?

Thank you!

CDNum.

The wisps of fine lines you are seeing on the numerals look to me like residual ink from incomplete wiping.

Printing ink is very thick, like a paste. It is applied to a plate by means of a roller, and the excess has to be wiped off to get down to the plate surface with the engraved lines filled with ink. Wiping is not perfect, and it is not uncommon to find places on a design were every last bit of extraneous ink has not been removed.

Better authorities on printing in the 1920s may tell you more.

cdnum,

If you CAREFULLY rub a piece of aluminum foil over a flat plate or rotary stamp, it will cause an imprint of the stamp picture on the foil. It will not do so on an offset stamp.

Jack Kelley

There are two things you may be looking at when viewing this stamp. One, in the event of a press shut-down, say as an example a plate breaks and a new plate is re-mounted to continue the production run, the plates are wiped-down with print rags and these small "scratches" way be what you are seeing at press start-up, before the print wiper blades are fully operational. There are automatic "wiping blades" that squeegee the excess ink from the plate during the press run. The blades, due to constant wiping develop gashes and gouges on the edges and eventually lose there edge and have to be replaced. (Think of how a windshield wiper blade works when new; how it progress with age, versus how it works after it becomes too worn.) -- you get same effect -- streaking. That explains what you are seeing.

Thank you Essayk, JKelley01938 and Hal. Very interesting.

Extra ink lines like that are possible on Rotary press stamp only or flat plate can do that too?

Thank you!

CDNum.

Both.