Scott doesn't call this a "major double transfer", but in terms of the number of features affected and the distance of the shifts, it's pretty dramatic. I already have this on a normal perforated stamp, but now on a part perf as well.
Doubling in the "U.S." and "INTER. REVENUE" across the top, both top numerals, and "FIVE" and CENTS" down both sides.
(The image below is 1600dpi, so if you double-click on it you'll get a much larger image.)
With all the first issue revenue plate varieties that are still unlisted, it's not surprising that it is not a major. This stamp has several double transfers, and a few would be called major if they were on postage stamps.
My information is that there are 7 double transfers of the border plate. There are no double transfers of the vignette plate. This example might be position 108; all the others are more major and mostly involve the lettering at the bottom with a couple having some doubling at the top
For postage there is only one specialist work, the Encyclopedia of Plate Varieties on US Bureau Printed Postage Stamps by Loren French. Out of print and tough to get, it runs about $50 and up when you can find it. Profusely illustrated. Books like Brookman and Johl also mention which stamps have known DT's, but they have no images. For revenues, the Shift Hunter Letters, about $7-$8 from Eric Jackson or Richard Friedberg, and the Revenue Unit Columns from the American Philatelist, which ran in the 20's-40's. About $35-$40 from the same sources. Plus articles in The American Revenuer.
Also, while not complete, I have some plate variety reference pages with diagnostics indicated. The problem with most of the older print references is that the varieties are either described verbally or have crude line drawings rather than actual images of stamps. I personally find it difficult to translate those into what I should be looking for on a stamp, whereas seeing an image of an actual stamp makes a much clearer and more memorable impression.