This machine could be my mother's featherweight's twin. Hers was purchased in 1947. The face plate and decals indicate pre 1950 although a few 1950 models still had the scrolly face plate but Singer was phasing it out as the striated (stripy one) was cheaper to produce. Does your machine have the full tray to hold the attachments in the case? That is another clue that this machine is probably late 1940's.