This is what Twitter looked like back in 1935
From the ‘what ever happened to’ files comes The Notificator, a short lived robot messenger which allowed users to leave direct messages for people in order to ‘cancel appointments or inform friends of their whereabouts’. To use The Notificator, which was installed in select locations in London in 1935, people would write a message on a continuous piece of paper, drop a coin in the slot, and then the message would appear behind the glass in full view of passerbys for the next two hours. Brilliant. Shame it never lasted.