Zorba, I meant to post here the other day, but had to go.
Is there anyway you can post a picture? That would really help.
But even without seeing it, I would venture to say that you are in the clear.
I say this because:
1/16th of an inch off is not really cause for concern in this case. Several posters from this era can be off by around that amount and be ok. Not all "41 inches long" one sheets are on the dot in terms of precise measurements.
Rolled is the exception rather than the rule for most posters before the late 80s, but they can be found, some easier than others...depends on the title.
I have NSS text to be more smudged than others on some posters, all legit pieces.
Again, I am about 99% sure...if you can post a pic that would really help.