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Told ya it is old. Tighten-up the top!
Hone it up, for Heaven's sakes! :D

I keep a little pile of it on the back of the shop sink to touch my damp toothbrush to. Works a treat on most every part of a razor, with exceptions, of course. Downward strokes with a pasted...

I would start light with it. Scrub it good with a toothbrush. Light simple green or something. Perhaps a touch of scouring powder.
A scrap of Scotchbrite and same to scrub inside of the scales....

Oh I was referring to the scales. Looks like a 1k will be fine to begin with on honing the blade.
That thing is bound to be pretty old..

Yeah, early stuff will oxidize rapidly in the wrong environment.
I say shine the sucker up a bit. Get a shave! :D

Good point, Birthday Boy!
It looks pretty nice as it is. Good old patina! :D

Are the scales aluminum? Looks like oxidation. They could be sanded. I have several with dissimilar metals. Never an issue.