Manufacturer: Regency Division, I.D.E.A., Inc.
Date: December 1954
Size: 5 x 3 x 1.25 inches
Transistors: 4 - (Regency part numbers) 100-626, 100-767(2), 100-628
References: TSM-2, Collectors Guide to Transistor Radios, Transistor Network (March-August 1994), Made in Japan, and many more!
Comments: World's first commercial transistor radio. Probably the most famous and certainly historically most significant transistor radio. Initially almost impossible to acquire, these are becomming available for sale and trade in good numbers. Uses 22.5 volt battery.