Rollfast Bicycle - Does the S/N mean anything ?

[Archie Sturmer]

I finally found a thread that might help me ID my ride. Looks to be E145989.
If “A” = 1945 is it safe to say this is from 1949?

Yes.
My 1949–E girls Rollfast bicycle has a “94SN” date-place code stamped on the bottom bracket, and was picked-up with a 52-tooth 1/2”-pitch (flying-R’s?) chain ring sprocket.

 

[Shellpuller]

My 1949–E girls Rollfast bicycle has a “94SN” date-place code stamped on the bottom bracket, and came with a 52-tooth 1/2” pitch (flying-R’s?) chain ring sprocket.

No bottom bracket stamp on mine.
Any chart for the seat post S#’s ?

 

[Shellpuller]

My 1949–E girls Rollfast bicycle has a “94SN” date-place code stamped on the bottom bracket, and was picked-up with a 52-tooth 1/2”-pitch (flying-R’s?) chain ring sprocket.