Colt (reference) Books

Have had these books for quite some time,
Colt blue handbook is really good condition, no date that I can see. Does not show a Python so kind of think early 60's.
Gold (yellow) colored book I believe 1/69. More of pamflets than books, possible they were in a box with a firearm.
Black one is pretty neat, think it's from 1972, would most likely been a counter top give away.
Someday they'll find a new home.

Have my Dads 100 year edition, 1936, very interesting.

That colt handbook is from 1952 or so.