Scott 443 Line Pair In Auction

Below is a picture of a Kelleher auction lot showing a line pair in which either the perforation holes or the guide line (or both, depending on how bad my eyesight is) seem to wander around. Is this typical/expected of line pairs in general/ this one in particular, or is there something unusual going on here? This one comes with a 2015 PF certificate. Thanks for any insight you can provide.

Interesting question. At first I thought perhaps it was issue with quality of scan. I reviewed a number of copies from Siegel search. The example above definitely has the most wobble of perfs and incompleteness of line. That being said, it appears most copies do have slight waviness of perf holes and or guideline.
I looked at a picture of it in catalog mailed to my house. Looks same as scan above.

I assume you are suspicious the guideline is fake?

My gut says it's real.

Thanks for the reply, rgstamp. I simply don't know enough about these types of issues to form an impression as to genuineness (is that a word?); it just looked odd to me as a neophyte. It has a 2015 PF certificate which I would assume is clean since the catalog description doesn't say otherwise. I would be interested in any comments from folks familiar with line pairs as to whether these characteristics can be expected sometimes or whether something funny is going on here.

Have a look at the certificate and see what it says. Then compare the certificate image to the auction image to see if they match, bearing in mind the discussions regarding image degradation and scanning which recently appeared on SCF.

Based on photos I've seen from various auction houses and certifications, the "wandering" perfs are not uncommon. However, the guideline should not vary in terms of spacing to the adjacent stamp designs (since the line and the designs were created on a sheet of paper simultaneously from the printing plate). The perforations were created by pins that punctured the paper. Those pins may have moved fractionally (as well as having varying degrees of wear at any given time) during the perforation "strike", which would explain the wandering holes.

The line does look odd to me, whether that's the image or my imagination I don't know.

It sold for $275. Seller's description was:

1914, 1¢ green, horizontal flat plate coil (Scott 443), line pair, o.g., never hinged, lively rich shade, a fresh and desirable example of this elusive multiple, Very Fine, with 2015 P.F. certificate.
Scott $325.

Nice to see a nice example like this bring a good return.

Not all certs will survive a review.