The hell with the date thing.
Why hasn’t the paper stock been analyzed for origin and age?
Why hasn’t the font and other characteristics of the typeface been analyzed?
What kind of typewriter was used and what year was it first manufactured? Was the model available in that country at that time?
These things are not that hard to ascertain.
This is a certified copy, which would mean it was printed this year on current paper. It appears to be a photocopy of the original, with the current hospital administrator’s stamp certifying it.