Governor cover housing for a Bosch/Zexel/Diesel Kiki style pump, guessing by the lack of part numbers other than "069" or "690" (can't tell orientation - see pics) and no "made in" branding that this is early Japanese and licensed by Bosch to Diesel Kiki/Zexel.  Appears to be square style to fit a P, PE or PES style pump and has threaded port on top for adjuster but no studs for an aneroid housing.  Clean used part see pics and see my other listings for more Bosch and other diesel injection parts