This lever is from a Pentax ME Super. It appears to be identical to the Pentax ME too.
Condition: The areas of aluminium oxidisation shown in the images are normally covered by the winder too cap completely, so then visible parts of this idem are in very good condition.
A note on Source: We’re not in the habit of stripping perfectly serviceable cameras for parts. This ME Super had heavily corroded chassis and mirror box and badly scratched man panels, so it’s been stripped for a few parts and will be binned in the most part.