 |
| 1957 |
We begin with the classic late 50s lineup. Silent-Supers in colours, along with the Sterling and Skyriter in grey and green.
 |
| 1958 |
One change is made to the lineup of manual portables: updating the Skyriter to give it white keys and a slightly modified logo.
 |
| 1959 |
Now the Galaxie is introduced with the white front panel.
 |
| 1960 |
One year later, 1959 models are still being sold (likely just old stock).
 |
| 1960 |
Sold alongside the new Galaxie, of course.
 |
| 1962 |
By 1962 the Galaxie has superseded the Silent-Super entirely, and a modified Sterling (probably introduced in 1961) is sold. The Skyriter is updated once more (now made in England as well).
 |
| 1963 |
Galaxie remains unchanged, the Skyriter is replaced by the Corsair, and the Sterling gets a facelift. Also, the introduction of the Coronet electric.
 |
| 1964 |
One year later there are no changes, but the old Electric is still being sold.
 |
| 1964 |
Galaxie II is introduced, with the jeweled bearing and Change-A-Type.
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| 1965 |
Same Galaxie II unchanged for the next year.
 |
| 1966 |
Super Sterling now replaces the Sterling in a Galaxie-style body. Corsair has red function keys.
 |
| 1966 |
 |
| 1968 |
The Galaxie Deluxe with tabulator bar and half/rapid spacing is introduced, possibly in 1967.
 |
| 1969 |
No apparent change for 1969.
 |
| 1970 |
Corsair Deluxe replaces the Corsair, and the red keys are gone.
This is by no means comprehensive, or for that matter totally accurate, but it's what I could gather with advertisements! I hope that it will be helpful for dating your 1970s SCM machines. It also shows that SCM sold older typewriters longer than I'd previously known.
