The Smith-Corona Galaxie is one of the longest-lived typewriter designs. While the design of the Galaxie debuted in 1959, it was not discontinued until 1983, with the end of Smith-Corona manual typewriter production. This is an early model. (Note the simplicity of the Smith-Corona logo) Also, notice that the case still has a wide stainless steel band--later cases are black with an inch-wide band of stainless steel. This is easily one of the best typewriters that I have ever used. The Galaxie is covered more in depth at Robert Messenger's blog: http://oztypewriter.blogspot.com/2012/06/made-in-england-and-us-scm-portable.html.
Here is an advertisement for the Galaxie from The Oregonian, August 15, 1962
Above is a page from a 1961 Belknap Hardware catalog.