I also have very vivid memories of this comet, though I thought it was 1958.
My recollection of the event is very clear, just my sense of time may be off.
I observed this comet for several nights from a small town in northern Wyoming
which had very little sky glow at that time (Worland, Wy).
Currently, From Tucson, Az on Monday night I could easily make out at least 10
deg of tail under rather poor seeing conditions. (on West side of Tucson, much
troubled with city lights)
Pima Community College