My guess on dating the bike would be early '70s ('72-'73?).
As much as I'd love a 60's bike, I believe this may be a pretty good assessment. The original owner tells me he purchased the bike circa '72-73. It's been a coons age since I had an old bike apart (to do basic lube maintenance, adjustments, and such). I'll do some chores for my gal to earn time in the garage. I wonder if I can even find my "Anybody's Bike Book?" That was the saving's grace of many a road tour in the pre-high-tech bike days.