This Light (Lamp) Socket for the Singer Featherweight 221 includes socket, terminals, socket cap. This part will only fit the black Featherweights that have the light switch on the base of the machine (not the light that also has the switch).
The Light Socket is only for Singer Featherweight 221 machines manufactured in the US from 1933 to 1957 and for 221 Featherweight machines manufactured in the UK from 1947 to about 1951 .See video tutorial above for details.
* Shade & Bulb are not included.