need some help with this Rollfast

[MR.559]

hey guys just picked up this Rollfast this weekend and im trying to determine the year and any other info you guys can help me with would be apprecated. the serial number are located on center seat pole bar and are c243237 thanks alot

 

[user 135]

judging by the dropouts and the skiptooth drivetrain= pre ww3

 

[MR.559]

getting close, thanks guys, anyone else???

 

[sensor]

id say 40's off hand
check here...
http://www.nostalgic.net/search/%25.htm
theres alot of pics and dates