i just saw this patent on ebay, and was wondering if this duofold was ever really made by parker:
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Posted 02 August 2017 - 07:00 AM
I have admittedly vague recollection that Dan had a proto-Fold in his book that channeled this design. I don't insist.
Your vague recollection is right: this patent and the prototype pen are shown on page 191 (see also page 192 for alternative prototype in this design) of the Duofold book
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