For your consideration, here is the Sega Master System The Ninja Game Cartridge, with case, from 1986, SMS, made in Japan. The cartridge contacts have been cleaned. I have tested it and it starts right up. The cartridge label has some heavy wear on it.

The case has a little wear on it. It is missing the tab and has a chip missing in the bottom right corner, on the edge. Item pictured is the actual item up for sale and comes from a non-smoking household. (225.231i-.10bb)