08-08-2021, 08:08 AM
The link that I supplied to the Tippers website is slightly misleading, as the illustration they use for a pre-war plate shows illegal lettering. There was no specified font - for example the figure 3 could have a flat top or a curved top - but the lettering had to be of a consistent thickness (5/8"), so any lettering which had different thicknesses for horizontal and vertical strokes, like the image on the website, did not meet the legal requirement. The modern fashion for serif-lettering is also illegal.