Farley's Folly Question

I was reading through my Johl's book on US Commemoratives and saw something that was interesting regarding the Farley's. It said that, besides the issuance of uncut sheets, the USPS apparently sold individual blocks of 4. 269,900 blocks of the Wisconsin issue alone. I'm trying to imagine the USPS going through the effort of preparing these. I'm assuming they must have set up a specialized cutter to do this? Anyone hear of this? I'm assuming most of these were just cut into singles, especially the National Parks issue. Seems most collectors go after the gutter blocks and pairs + a single set of singles.

Regardless of the exact sale details, since the Farleys were sold primarily to collectors the survival rate is quite high for any cutting format. They can be readily found at a modest percentage of catalog if you are patient and shop around The challenge is to find each of the special printings proveably identifiable by various margins, gutters, & guide lines used on-cover, and *not* a FDC.

As an aside about the regular perforated National Parks issue Johl mentions that several occur with two slightly different dimensions due to some of the print-run being printed with the paper rotated 90 degrees to the paper's grain. This is not covered by Scott.