Parry and Close combat

[Bruno]

Originally Posted by ArchonShiva

In GURPS terms, that’s a different weapon using a different skill: Probably Brawling with a fistload. It’s not a greatsword attack.

Using a different skill is not "a different weapon", it's a different application of the same weapon. Weapon Master is on a per-weapon basis, not on a per-skill basis (nor on a a per-line-in-the-weapon-table basis, the intersection between the two).

Or weapon groups of course but again, that's by the weapon, not skills.