Mid 80's Day-Date - mystery minimalist dial

[DDay]

Hi Everyone,
This is my first post so sorry if I am in the wrong space as mid-80's is perhaps not exactly vintage. I have a gold, black onyx date-just from my father who pasted last year. What is unusual is it has the Crown and word Rolex on the dial only. None of the other verbiage, and T SWISS? at the 6 o'clock.

Is this an albatross? Did a minimalist branding dial in '84-85' exist, or did the jeweller do something to remove other text (oyster perpetual day-date and superlative chronometer, officially certified)?

My father also had a diamond bezel instead of the fluted, which according to the serial no. it ought to have. It is with the Rolex dealer now and they say that if any part is not original Rolex, I have to replace it or no service.

it is the dial that I am most curious about because this might be some rare select few dials which actually makes it very interesting. I do dig that it is ultra minimalist even though my father may have had the jeweller add the diamond bling. (file image too big to post)