Is This A Joint Line Pair ?

Marvelous information Russ
great, never seen before image of the cylinder.

I'll watch on

Personally, I think I have it, joint line pairs
may evidence "feathering" or indistinctness around the line.
Also the line may not be exact centre.
whereas a line pair will will be crisp with sharp
edges.

Based on that (and a less that adequate scan)
I would suggest stallzer has a joint line pair,
and the image of Cjd's I posted is a guide line pair.

So we must use I guess, either of

Joint line Pair
Guide line pair
Paste up pair

Do I understand from the discussion that paste up pairs also occur on rotary press printings? I have always thought that one reason for the development of the rotary press was to facilitate the production of coil stamps, since the length of the coil was determined only from the length of the coil of paper.

On the flat plate printings, of necessity, the sheets had to be joined by pasting them together. This was a very labor intensive process, hence the prod to the development of the rotary press.

(One random thought---did the pasting together of the sheets occur before or after the application of the gum)

rohumpy, early rotary press coil length was 500 or 1000. If the sheet was shorter than that is was cut up an the joint line and not used for coils. Later (about 1930) to maximize the output the remainder sheet was spliced end to end to another sheet. Where the paste-up (flat plate) occurs every 20 stamps the splice as only one roll of printed paper to another. These rolls of paper were several thousand feet long.

So it would seem to me that the paste-up on the rotary press printings would be many times scarcer than the flat plate. Or am I making an unwarranted assumption?

No clue as Scott does not even recognize them, as far as I know.

There are a lot of varieties that are no Scott listed.

Well, here they are hot off the press. I'm quite relieved as you never know what will happen until they are in your hands and I have to give the seller credit as they delivered exactly what they advertised. They are a tad off center but for $25 and some change, I couldn't be happier with this purchase.

Whoah. The scan makes them look like they are knit rugs.

Also made me notice that there is a spec of some sort on the left stamp under the right 10¢ numbers....

It looks like an inclusion to me.

A what ?

An inclusion in a stamp is where foreign matter falls into or otherwise introduced to the wood pulp during the paper making process. The paper is pressed, and the particle is included in the very "fabric" of the paper.

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I would add that I think of an inclusion as an EFO (an error in the paper-making process). Others will see it as a fault.

sorry to barge into your party I'm new here and was wondering if any of you have ever seen a double Joint or Guide line pair of coils

Paste-ups are listed for the imperf coils.

These are not Paste ups I do have a strip of 4 that is but the strip of three and another Pair are not.