Thanks as always for your input Steve. My definition is more narrow but as you know I collect recurring print oddities whatever they are, and agree the 69s and 58s could involve intentional changes in the printing process either way.
Not sure if we did this one. The one on the bottom left is pretty tough. The slight differences on this one remind me of those on the font of the 55 Sullivan (106) and 56 Pepper ( 103), and the back of the 56 Schmidt (322)
