Hi!
It looks all original to me. Nicely aged dial too. Compared to my own 145.022 CRS, the lume on the hands is rather white. These could be Service.
Hard to say whether the bracelet and end links are the factory original ones. Close ups of the clasp and end links would help determining that.
Out of curiosity; what makes you pinpoint this one to be an 1984 example? 47xx serials like these could be a few years ‘younger’. My 47133xxx came back as 1985. Only an extract could give certainty.
Good luck on your decision!
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