Thanks, reddesert, but there was no box, just the spool and backing paper which I described in, I think, as much detail as would have been the case with a picture of that spool and backing paper.
There may in fact be no way to narrow down any range of dates from the backing paper but I am surprised that given what I thought would be the knowledge of "things Kodak" here on Photrio, that there hasn't been more response.
However not the most exciting thread, I do admit
pentaxuser