Fun fact: the Perkins Brailler is the most widely used mechanical braille writer in the world since it was introduced in 1951. Sid demonstrates how it works. #Braille200 [Video description and transcript: Sid is sitting at a table with a grey Perkins brailler on it, there's a narrow shelving unit behind him. He's wearing a red shirt with white checks and sand coloured trousers. He has brown hair and wears a lanyard around his neck. As he talks about how the brailler works, he moves his fingers o