That master cylinder couldn't have been on the car when it was new......it's an aftermarket piece! And as previously noted by several here, it is a drum brake master cylinder, so it is not only incorrect but also could be dangerous on a disc brake car if you let the fluid get low.
Check the casting number on the bottom, I'm thinking it is 5 numbers starting with 29xxx. Which would make it Raybestos, my old work.
And a correct Bendix disc brake MC will be painted black.