D: Difference between revisions

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At the time it was called Type 53D.
At the time it was called Type 53D.
It was briefly renamed 53D/54D in 1955 with the introduction of the [[541]] and [[545]],
It was briefly renamed 53D/54D in 1955 with the introduction of the [[541]] and [[545]].  This quickly changed to 53/54D, and finally shortened to just "D" in 1959 with the introduction of the 5xxA scopes.
and then quickly changed to 53/54D, shortening to just "D" in 1959 with the introduction of the 5xxA scopes.
Its final year in the catalog was 1968; it had been superseded by Type [[W]] and then [[1A6]].
Its final year in the catalog was 1968; it had been superseded by Type [[W]] and then [[1A6]].


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