Perf 12 Coils 1908-10 - Need Some Education

Check out this copy of the PSE Grading Guide, in particular the discussion on Reperforation starting on page 34. It is a very good discussion on what to look for to ID fake perfs!

http://www.psestamp.com/pdf/2009_Gr...e_092009.pdf

Caper, thanks for the link!

Most unused fake coils were made by adding perforations to imperf coils or imperf sheet stamps. Most used fake coils were trimmed from sheet stamps with occasional trimmed booklet pane stamps. Hand trimmed margins rarely are parallel or straight enough to be convincing.

Those margins are often razor or scissors cut, so they don't look natural.

True... but in the case of 374a, I'd doubt anyone would cut one
to create 387's, unless in the case of a line pair, and I don't
recall ever seeing any booklet panes from that period with center
lines... the line usually falls on the outside edge, if it's even
there at all.

I;ve drawn a black box that is almost parallel to the left edge of the right stamp, but the other side of the box clearly shows the joint line is at an angle.

So I've been staring at the perfs on these coil pairs. Some actually look good and some not so much. I also upgraded my scanner, so have a look at these two examples and see if you agree with my conclusions.

I think this first pair perfs are fake:




I think this second pair looks good. There is consistent roughness on the same side. I don't see "pressure ridges" but I'm told that is quite hard for perf 12 stamps anyway.

Bump

I have several 1 to 5 cent perf 11 coils. What is this about? Why would they exist. I have 22 of them both vert and horz. perfs?

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The perfs on the second pair look OK. The holes in the first pair are fake. The pins of the stroke perforator used to create the fake may have been a bit dull accounting for the few fibers and slight tearing evident around a few holes.

Most likely you aren't measuring correctly. I'd suggest posting a photo and let us know how you are measuring perfs.