Printing Errors - Questions

From definitions I found googling (Linns):

Offset:
1) A printing process that transfers an inked image from a plate to a roller. The roller then applies the ink to paper.
2) The transfer of part of a stamp design or an overprint from one sheet to the back of another, before the ink has dried (also called set off). Such impressions are in reverse (see Mirror image).

They are different from stamps printed on both sides.

The Lot description of the Harmer-Schau example:

U.S.; General Issues, 1873, 3¢ Green, Heavy Offset on Reverse, #158 var, used, very strong mirror images of parts of 4 on reverse, spectacular variety, erroneously listed as #158k on cert., Very Fine, 2006 P.S.E. cert.

I think sinclair2010 has it correct...Removing sheets for continuous proof reading and replacing sheet to the stack...Maybe thumb print.

Robert

worn plates rust, thumb or finger prints, pitting and plate cracks and poor impressions caused by too little or too much water are often found on these issues, along with set-off from wet sheet stacking. they are most common on the 3 centers as they were the most widely used. one big cause was the quality of the steel used in making the plates. paper quality also played a part in the mix.

Another banknote (Sc.158) with a printing (actually perfing) issue. Would this be considered a vertical perfing error? How should this example be described? Vertically imperforate on left?

It's miscut. Printed in sheets of 200 cut into panes of 100 thru that gutter. I think pieces like this were called straddle panes at one time. Properly cut each sheet yielded 20 straight edged stamps.

Can anyone post a good image of a double transfer of one of the varieties of the 3c green banknote (136,147,158,184,207)???

I have purchased stamps described as being such an animal but I can not see it on the stamp in hand.

banknoteguy, re offset: As you saw from the definitions you found there is some inexactitude of usage here. The term "offset" to describe a particular printing method is well-established. The same term at one time was also used to describe the transfer of a design from one sheet of stamps to the back of another, as in your original example. In more recent times the term "setoff" has been introduced to describe the latter phenomenon, the term "offset" thereby being unambiguously reserved to describe the printing method. I suppose there is a lot to be said for precision, but to my aged philatelic ear the word "setoff" sounds weird. I still use "offset" in both senses.

I agree with you Dudley and I prefer to use the term offset although I have been trying to conform.

So, we create confusion so we won't have confusion. Makes perfect sense...not!

Eschew obfuscation!

Don

I am definitely better informed about the shades of meaning of the terms offset and setoff. And only the tiniest bit off put ...

I have been using "offset" in both ways for far too long to change now.

The term "offset" is correct in both instances. The stamp is printed with offset intentionally. The wet stamps, when stacked unintentionally offset on the stamp above.

offset is plate to offset blanket to stamp using oil and water repel, setoff is direct wet stamp to stamp transfer

I have another stamp that I have questions on. I think this is a short transfer but would like other opinions. Especially anyone who has seen this same/similar thing on a S.147 banknote.