In July 1973, the US Post Office issued 4 commemorative stamps honoring Progress in Electronics.  This 8c stamp highlights the transistor,  a semiconductor device, used to amplify or switch electronic signals and electrical power.  Various scientists worked on developing the transistor. Julius Edgar Lilienfeld patented a transistor in 1926, but he was not able to actually construct a working device at that time.  The first produced device was a point-contact transistor invented in 1947 by American physicists John Bardeen, Walter Brattain, and William Shockley.  They won the 1956 Nobel Prize in Physics.  This device revolutionized the field of electronics, and paved the way for smaller and cheaper radios, calculators, cell phones, and computers. Their transistor is listed as one of IEEE milestones in electronics.  

It is handsomely displayed in a 3.75 by 4.75 inch wood frame. Please indicate what color frame you prefer:  walnut, white, or black. If no color is selected, walnut will be sent.

A  bit more history: The United States Post Office issued its first stamp on July 1, 1847.  Since that time, over 5000 stamps have been released. Each stamp is given its own identification number called a Scott Number. This stamp has been designated as Scott Number 1501.