Is it a three color cover because each stamp is a different color?
If so, if there are only 2 different colored stamps is it called a 2 color? How many colors can one have?
I love the handwriting on old stuff. Now a days, with computers, email, typing, I wonder if they still teach cursive in the schools? I saw The Amazing Race the other day, one of the challenges was to type an old typewriter, and they had problems with that

I loved typing on typewriters!
I also notice the seven horizontal lines with the number 5... what's the difference between the straight horizontal lines and the wavy flag like lines? I think I recall from one of my threads that the number in the lines, is the machine number....
Thank you all!
SueStamps