パーカーの名品「デュオフォールド」の歴史の全てが詰め込まれた図録です。ペン好きの知人にいただきました。一般には流通していないようなので、希少です。

Parker duofold : Shepherd, David (Pen retailer) : Free Download, Borrow, and Streaming : Internet Archive

PARKER Duofold P. W. Akkerman 100 Years (1910 - 2010) Limited Ed. Fountain Pen

Parker Duofold Arnold Palmer Signature Fountain Pen | EndlessPens

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1946 Parker Duofold NS (Semi-grail) | Pens and Sensibility

Catalogo Parker 1922 – parkersheaffer

Four pen reference books including Parker Duofold by David Shepherd and Dan Zazove and Parker 51 by

PARKER DUOFOLD OXFORD UNIVERSITY CIRCA 1990 FOUNTAIN PEN AND PENCIL SET

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Parker Duofold – PM Pens

Parker Pen books I found. Anyone know anything about them? : r/fountainpens

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Fountain Pen Profiles: Parker|eBook

Parker Duofold