What’s the difference within a grading? A lot, it would seem.
Here we have four Ploughman tenners, all graded in the VF region, by the same company in and around the same time.
Are the two '20' notes the same grade, and are the two '25' notes the same grade? Why not use numerals between 20 and 25 for more accuracy?
I would grade this one as VG
This one as Fine grade
This one I wold grade as Vg to About Fine
This one I would put at Good Fine