Hey, you know that one scene in Return of the Jedi Where Darth brings Luke to The Emperor and he says “Ah, yes. A Jedi’s weapon, much like your father’s” Would that mean only the Jedi (Pre Prequels/EU) used them officially labeled as their own weapon?

Meaning that Vader would be the only Sith in out of all to use one as his own.

Note: The term Sith was used in one of the original scripts for SW77

JEDIT:

That makes me theorize that the previous Sith before Vader only used their force abilities/powers and other.