We could see that at the terminator, at the boundary between the black part of the moon and the lighted part of the moon. It was as if you were looking at a television set with the contrast turned to full contrast, very black and very white.
from http://youtu.be/PtdcdxvNI1o?t=1m30s Sky At Night BBC 1970 , Neil Armstrong & Patrick Moore
We could see that at the terminator, at the boundary between the black part of the moon and the lighted part of the moon. It was as if you were looking at a television set with the contrast turned to full contrast, very black and very white.
from http://youtu.be/PtdcdxvNI1o?t=1m30s Sky At Night BBC 1970 , Neil Armstrong & Patrick Moore