Also you can see the credits in the pre-hyde park album "Blues From Laurel Canyon" and it's clearer than water thet it's 1949.
It's not big deal but basic stones-culture
This is me and Mick during the interviews I conducted for TV and Newspapers in 2001
During those days in addition to the interviews we shared a lot of time and fun, I can consider him a friend I didn't ask that question as I already knew the answer, but Curtis did it and you now have the right answer
BTW, this have been discussed several times in e-mail lists and forums and the date 1948 is in many books, encyclopedias and websites but it's just a big mistake