What year did Craftsman tools changed the logo that they put on handtools?

I am trying to date a socket set that was given to me. The logo is the "craftsman" where the "C" underlines the rest of the word craftsman.





I think that they changed it sometime in the 50's but I am not really sure.





If you know of a site or other ways to date it, please let me know.





Thanks.

What year did Craftsman tools changed the logo that they put on handtools?
Please see the history in the web site:


http://www.roseantiquetools.com/id116.ht...