They were around, but rare.
I doubt it. Neither one of these suspect BCs show the characteristic superb spacing and even baseline ability, giving a near "typeset" quality, for which that the IBM Selectric was famous. Instead we see slipped spacing, baseline jumping, and even close overstrikes. That would not be possible on the IBM Selectric.
Actually they look like the product of old, worn typewriters that might be found in government offices. . . especially colonial offices that got the hand-me-downs of other more important ministry offices.