What black-lined page borders?
Do you mean the boxes in which the handwritten information is?
How did they print crossword puzzles in 1961?
“How did they print crossword puzzles in 1961?”
Don’t you know they took each individual paper, typed a line across, then took the paper out turning it sideways and typing another straight line.
Now that symbol at the top of the page would have been a doozy and taken all day!
(this was sarcasm because I expressed a similiar sentiment to the poster)