[Shezan]

I owned a Selectric in the early 70s, so yes, they were common.

That being said, the discrepancy in signatures seems too great for it to be the same. Also, if Killian had a Selectric in 1972, why was he back to a mechanical monospace typewriter a year later?

[shezza]

...if Killian had a Selectric in 1972, why was he back to a mechanical monospace typewriter a year later?

Try a MONTH later: