Ribbing On Sc1 Question

I was wondering if this type of ribbing is found on particularly one of the five printings for this issue. It can be seen quite well from the obverse, which was where I initially spotted it, and only flows in one direction. I'm guessing it's machine-made paper from one of the later printings?

An informative read regarding ribbed paper:

https://goscf.com/t/61224&whichpage=1

Thanks for the response, Rog. I actually have that thread saved on my desktop as one of my main references. A lot of good information there.
It focuses mainly on ribbing for the Banknotes, which I believe is treated separately when referring to ribbing found in paper before or after.

According to the Calvet Hahn piece,
http://www.nystamp.org/postal-histo...ic-is-paper/
the machine made paper of the 1951 imperforate sometimes showed ribbing, but I wonder, because of pieces like this, if that same machine-made "ribbing" went back earlier to at least the second printing of the 1847 issues (being the start of the Fourdrinier production).