Patent Plate Minutiae

[JonE]

Thank you Henry. Just to confirm, I can assume these are 1931 cars?

Interesting to note, although they both contain the same information, they are quite a different 'design'.

are you sure they are quite a different design? Perhaps more detailed images would help. If one rubbed the blacker one down with fine wire wool, would not the black be left around the edges of the relief upstands as shown by the other one? The cleaner one has obviously been restored/cleaned and refitted hence the background, I'm imagining.