Ring ¾ /

This elegant key belongs to an Underwood Portable from 1930´s. The underwood Company fabricated this model between 1930 and 1936, a smaller and more portable model so that journalists could transport it more easily. 

What I like about the forward slash symbol (/) is that it serves to indicate line separations in poetry. The slash represents what would normally be a line break if the text was formatted using verse rather than prose. As well as this, the symbol  ¾ is very representative of Harry Potters novels: Platform nine and three-quarters is the train platform from which students board the Hogwarts Express.