Hitachi AM Seek Radio - Faceplate font differences? (TM-1081ZB)

[GoldAir]

Hi all,

Does anyone have any insight on the different fonts used on the Series 1 AM radio faceplate for the numbers? I can see two styles:

1. A more rounded sans serif font, as seen here, here and here (on the $310k BaT sale)
2. A stenciled, almost "military" style block font, as seen here and here

I'm unsure if it's factory differences, a different model (I've seen references of a Hitachi TM-1081 with different Z and B codes), or simply restoration work.

Any information would be appreciated as I'm trying to acquire an original, correct radio for my 10/71 Series 1.

Attaching images here also incase the links go dead in the future.