Maybe early 70s then...
I just couldn't believe I got it for $10!!!

I have some Craftsman boxes similar condition to yours that are slated for restoration someday. I will follow your results with interest. Regarding color choice, I typically want to stay with original colors but, there are so many of these boxes out there I think why not go with your favorite choice. The blue one posted here looks great. Black, red or something different will look great. Now you got me thinking about color combos. Hmmmmm…..