I had to get some copies of bc’s here just a few weeks ago. One the ones I needed certified, they hand typed the info on a fancy bells and whistles form and stamped and sealed it. I should add that there was more info than the Kenyan and tons more than the Hawaiian and it filled the page. The ones I wanted a copy of but didn’t need to be certified were just xeroxed and stamped (apparently there are 2 levels of verification of info here and to me the cheapie xeroxed one is more “real” but whatever). But my point is, it doesn’t matter so much what technology they had available, but how they were required by law or by tradition to do things.
My copy of my BC is a Photostat. It is a negative image, with with writing on black background.
(Also, some of you may remember (in the 50s) libraries had a machine that microfilmed the book card and your library card. If it was overdue, they sent you a negative print as notice.)