These Bakelite 3-Prong Terminal Receptacle are all original and includes the three post thumb nuts for the backside. These are often cracked or chipped as Featherweight machines were placed in their cases. The terminal would get caught on the right side of the case causing it to break.
The round pin receptacle will fit US and Canadian Featherweights with the plug that has the cords exiting on the top. The flat prong terminal will fit the 221Ks and 222ks with the plug that has the cords exiting on each side.
* Bakelite Plug is not included.