Product: IBM Keyboard Model M 1391401
Brand: IBM
The IBM model M keyboard is the rare piece of electronics or computing technology which is both a "historical" vintage item and also a useful tool in today's computing environment. Most modern "free with purchase" keyboards use lower-cost rubber-pad based technology. IBM model M keyboards are unique in that each one is individually labeled with a serial number and the "date of birth" is printed on the back. The Model M keyboard is a designation for a group of computer keyboards manufactured by IBM starting in 1984 Under each keyboard key there is an individual spring that when compressed converts physical force into an electrical signal.
IBM Keyboard Model M 1391401

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