Postage stamps are being issued to celebrate World Radio Day which takes place 13 February 2013.
Radio Day is observed on 13 February 2013, which marks the day when the
United Nations Radio was launched in 1946. Since its establishment, UN
Radio has used its multilingual programmes carried by media outlets
around the globe to tell the story of the international community’s
efforts to meet the challenges of building a better world.
United Nations Postal Administration (UNPA) will issue a series of
stamps depicting scenes from the history of the United Nations Radio.
More information - http://dxersguide.blogspot.in/2013/01/un-radio-world-radio-day-stamps.html