The Minim, another Parker BP for women, designed by Walter Bieger, is actually only a fraction longer than the Jotter refill.
This was accomplished by designing a side action mechanism with a slightly larger diameter cap to enable housing of this mechanism.
Here's a picture of the regular, compact and Minim beside a Jotter refill followed by some more Parker ads for the Compact model, some of them, as Len mentioned, would not fly today
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