Those other BC's would show the same amount of ribbon detritus in the same letters.
The only paper stock here is the one used for printing two days ago. The black, inky parts are a gray-scale scan from some other original print overlaid onto the green patterned background. (Don't be confused that the curvature of the "black info" (haha) doesn't follow the uncurved nature of the green, patterned paper.
The ink is that of a (most likely) laser printer of today's vintage. Not much to be learned there.
The raised capital letters when switching back to lower-case letters is a sync issue with the typist's use of the Shift button on the typewriter.
I find the disappearing M of P.M. curious. It's as if the paper was fed in a second time to get something that might have been missing.
The half-line spacing to get to the X boxes is fodder for investigation. I'd like to compare with other BCs of nearby date.
HF
Another post said that the M. was preprinted on the blank birth certificate form back in 1961 so the typist only had to type "7:24 P." Both P.M. and A.M. end in M. so they typist saves nearly 1 second not typing the M (it probably makes sense if you create government forms for a living).