O: Difference between revisions

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Type O was [[introduced in 1962|introduced in mid-1962]] and it was
Type O was [[introduced in 1962|introduced in mid-1962]] and it was
available right up to the discontinuance of the entire 500-series scope line in 1974.
available until the discontinuance of the entire 500-series scope line in 1974.


The Type O can be used with any of the following adapters:  
The Type O can be used with any of the following adapters:  

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