US Coil Misperfs

How common are mild but very evident misperf errors in modern U.S. coils?

I know that you can find them in most Canadian coil issues from all the Queen Elizabeth definitives and through the parliament coils but they are rare enough to make a pleasant find. Prices, once you start looking for them, vary wildly even for similar errors in terms of perforation shift on exactly the same stamp so I have never been tempted into actually collecting them. Do the U.S. coils have a better record of inspection and catching these mistakes or are they as easy to come by?

I have included a scan just to show the type of thing I am asking about.

not that uncommon with this series of stamps.

For a while, I did some work with the coils of the Canada Centennial Series (1967 and following). It seemed to attract varieties like flies to honey. There were perf shifts, imperfs in the middle of a roll of coils, imperf between both with and without scoring to indicate where they should have been cut. I think at least a portion of these must have "escaped" from the printer rather than having been issued by the Post Office.

Is this common to all countries? I think running across this one U.S. pair is what really prompted the question. I can understand the interest in material that reaches a Postal Outlet and is sold for postage. I get really, really excited if a postally used example surfaces. However, when you start finding what is or should be printer's waste hitting the market, it kind of discourages me from pursuing that particular issue.

Although this is not as significant of a misperf as your example, it just goes to prove that there are many out there. What I find interesting about this example is that it was a cover serviced by the USPS in Wheeling, WV and they didn't seem to care about using/not using the perf shift coils to make up the required first class postage rate (in 1982) for this cover:

Now if that doesn't make a misperf legitimate, I don't know what would. A very nice FDC, in my opinion.

Every once in a while when digging through kiloware you can find US coils or booklet stamps with a partial plate number due to them being cut off-centre. I have a couple of airmail coils from the late '60s - early '70s era that I've come across. Here's an example, pinched from the American Plate Number Single Society website.

http://www.apnss.org/index.htm

Ryan