Master cylinder question? What's it fit?

For crying out loud guys, I'm not asking to identify a part on the frekin space station, or the Martian Rover, just wanting to know if anyone can ID the damm thing by the casting number, or part number, in the pictures that i posted.
Not wanting to make a mountain out of a mole hill.
I'll put it up for sale as a manual brake, drum, drum, master cylinder of unknown manufacturer.