The listing, 2 - S.P.E.W. Buttons has ended.
These buttons DO NOT have pins in the back of them. You'd have to add that yourself! Winner gets TWO buttons.
The Society for the Promotion of Elfish Welfare, also known as S.P.E.W., was an organisation founded in 1994 by Hermione Granger in response to what she saw as gross injustice in the treatment of house-elves at the 1994 Quidditch World Cup in the book Harry Potter and the Goblet of Fire.
Having been deeply upset at the treatment and general prospects of house-elves both in Hogwarts and the rest of the wizarding world, Hermione set up S.P.E.W. in order to champion their rights. Hermione originally wanted to call the organisation Stop the Outrageous Abuse of Our Fellow Magical Creatures and Campaign for a Change in Their Legal Status. Since it wouldn't fit on a badge, it was given its current name, though the original name was retained as the heading of the group's manifesto.