![](http://3.bp.blogspot.com/_WjxBSW9JWRY/S6DRq7lpbXI/AAAAAAAADf0/ZgIkjN51IA0/s400/3p.jpg)
![](http://1.bp.blogspot.com/_WjxBSW9JWRY/S6DRqZNpLiI/AAAAAAAADfs/arAr88hu8Qk/s400/5p.jpg)
![](http://4.bp.blogspot.com/_WjxBSW9JWRY/S6DRp6Je0ZI/AAAAAAAADfk/r6tOUWBZASc/s400/7_1_2p.jpg)
#68 - set of 4 stamps celebrating 50 years of the BBC (1922 - 1972).
Designed by David Gentleman and released on 13 September 1972, these stamps have great illustrations of equipment significant in the history of broadcasting; 3p - Microphones, 5p - Horn Loudspeaker, 7 1/2p - TV Camera and 9p - Oscillator and spark transmitter (Marconi/Kemp experiments 1897).
Here are the first day covers for each stamp, which are also pretty cool...
![](http://1.bp.blogspot.com/_WjxBSW9JWRY/S6DROVqht5I/AAAAAAAADfU/IOgCaY9yoy8/s400/3p_cover.jpg)
![](http://3.bp.blogspot.com/_WjxBSW9JWRY/S6DRN8sJG8I/AAAAAAAADfM/8j1VqmSpLAY/s400/5p_cover.jpg)
![](http://3.bp.blogspot.com/_WjxBSW9JWRY/S6DRNdSndZI/AAAAAAAADfE/vJmdPihFSs4/s400/7_1_2p_cover.jpg)
![](http://3.bp.blogspot.com/_WjxBSW9JWRY/S6DRMwC1_cI/AAAAAAAADe8/Y4hKfAHOjT8/s400/9p_cover.jpg)
See more David Gentleman designed stamps from the reference box
here.
https%3A%2F%2Fwww.deliciousindustries.com%2Ffrom-the-reference-box-68
Delicious+Industries%3A+From+the+reference+box+%23+68