BeeSee, the stamp you show definitely includes a guideline at left with some guide dots. These are very common on the 2c Large Queen. The plate (or possibly one of two plates) used to print this stamp was not cleaned up very well before usage and the number of guidelines that remain on the plate is quite extensive. The image that JimJung shows of a Horace Harrison illustration is referring to additional misplaced guidelines that appear only along the bottom of the sheet. Notice the cross-hair guidelines that appear under the left corner of most of the stamps in the image. These are normal but unerased vertical/horizontal guidelines that appear crossing the guide dots that are used to layout the plate. Notice that figure 4 shows the dot but no guideline going through it. These are examples from the bottom of the sheet showing typical guidelines similar to what is on your stamp. What the illustration is trying to highlight is the additional vertical guidelines that appear further to the right on these stamps. Notice how they appear progressively further to the right on each stamp image. It is the distance between the normal guideline (through the guide dot) and the incorrect guideline that can be used to plate stamps from the bottom row.
The illustration shown by JimJung was part of an excellent series of Large Queen variety articles by Horace Harrison from Maples Leaves in 1961. You can download these as PDF files from the following page:
http://www.canadianpsgb.org.uk/mapl...ume%208.htmlThe article on the 2c is Volume 8, No 12; August 1961, whole number 72. Despite the age of these articles, they contain a surprising amount of little-known information and were the source of much of the variety discussion in the Duckworth's famous Large Queen book from 1986.