Hello all,
After being bitten by the Raleigh bug as a result of reading nearly all of this most excellent thread, I've bought one of my own. The hub is stamped 50 - 1 so I take that to be January 1950.
It has the AG 3 speed dynohub plus all the fixings and mechanic oil points not to mention a "cyclo" three speed derailleur that I am curious about; somebody here mentioned it once as a '50s option. It also includes the original B66 in good condition. It has sat for the better part of 30+ years and will need many Sunday afternoon work sessions - I can't wait. More photos to follow with better sizing.