Hi Dan,
I have a Cub like yours that is 35#. It is a reflexed longbow. It measures the same as yours tip to tip (it is marked 62"), and the string I made for it is 58". Gives it a 7" brace height, give or take.
As far as the year, I was told the mid-1950s, but I really don't know the exact year. You might post over on the Trad History/Collecting forum and get more answers.
Any deer yet? I have relatives in the thumb, and have a hankering to get back there next year to hunt whitetail again.
RonP