and the 1980's faceted VP:
The concept was to have the convenience of a ready to write instrument without the need to remove the cap. It was designed in 1963 to celebrate the Tokyo Olympics Games.
The first model was activated by a twist mechanism followed by the better known push button and having also a slide clip mechanism in 1968.
It was and still is produced continuously with some design changes of the body and clip ...
Here are models from 1964 and 1965 (bottom one)
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