I just watched it today. Ah miss those.
I think it's rather interesting on how they showed how "Mammy" looked like, even if it was a split second shot.
Here's the episode I'm referring to:
YouTube - Tom and Jerry Eps 59 Saturday Evening Puss
And the screenshot:
Shot of the original Mammy
The reason why I brought it up is because they re-dubbed her voice and gave her a new look since the original version was considered racist.