Nice one again!
Yes this blade could indeed use a clean and etch! (as I am perhaps not against etching but just against destroying patine friend) And perhaps a nice modest polish after.
Hope you can wiggle the once broken end off easily and a good thing those pins are wood instead of ironnails; would be a hell of a job otherwise! You might first wrap a cloth around the endpiece for better grip.
Tip; to make a most tight fit after (loosening), you might need/consider to slightly grind the 2 breaksurfaces a bit hollow or concave. Otherwise -I know from experience- the glue will always be 'in the way' of the most tight fix.
With making concave I mean that only the outeredges will be very slightly standing above the rest of the breaksurface.
Good to have a history with it and . . .the scabbard.
(Hope you are not cross with me for my last comment on etching the tabak?! It was just my love for these blades n patine that came up
)