Parker Jr Duofold, c. 1928, USA, junior size, flat top, lapis lazuli permanita, two cap bands, barrel imprint: Geo S. Parker Duofold made in USA, solid gold  Parker Duofold Pem Pnib, medium point, nice iridium. Button filling. Length capped 11,5 cm, posted 14,3 cm, diameter 13 mm. Excellent condition. #1383 $USD 180

Parker Jr Duofold, c. 1928, USA, junior size, flat top, lacquer red permanita, two cap bands, barrel imprint: Geo S. Parker Duofold made in USA, solid gold  Parker Duofold Pem Pnib, medium point, nice iridium. Button filling. Length capped 11,6 cm, posted 14,6 cm, diameter 13 mm. Excellent condition. #2280$USD 130

For illustration: picture of different English Parker Duofold model sizes, from left to right:

Green Arrow, black Maxima, black  Senior, black AF double jewel, chocolate AF,  green demi Duofold, green Junior Duofold, blue Slimfold, Vacumatic Major (USA).

 

Parker "Duofold DJ NS", England, c. 1946. The "DJ" stands for doble jewel and "NS" for new style, in classic black, with gold filled chevron cap band, nib Parker Duofold 14K Pen N(N for Newhaven the site of the Parker manufacturing plant in England), the nib is broadish medium, bronce filler button. The Duofold was the mainstay of the Duofold range and very popular as a big handsome pen with a traditional open nib and capable of excellent writing performance. On the barrel still legible Parker. Lenght closed 5 1/8" / 131 mm. The button filler is in perfect condition and works fine. Very good, no brassing, juicy nib, very scarce with doble jewel.#1690 $USD 180

Parker "AF Duofold NS", England, c. 1954. The "AF" stands for "Aluminium Filler" and refers to the filler button, the aluminium variety which superseded the brass button type in 1948. In classic black, with gold filled chevron cap band, nib Parker Duofold 14K Pen N (N for Newhaven the site of the Parker manufacturing plant in England), the nib is broad, slighly oblique stub. The Duofold was the mainstay of the Duofold range and very popular as a big handsome pen with a traditional open nib and capable of excellent writing performance. On the barrel crisp imprint Parker Duofold Reg. T.M.Made in England. Lenght closed 5 1/8" / 130 mm. The button filler is in perfect condition and works fine. Excellent, no brassing, juicy nib.#1030 $USD 160

Parker Duofold NS, c. 1953, England, solid green celluloid, gold filled clip and broad cap band with chevron pattern, aerometric filler, medium fine point original nib imprint  "Parker 14 Kt 585 England 35" Length capped 5", posted 5 7/8", diameter 1/2". Minimal plating wear on the edges, upgraded nib size, excellent. # 1298 $USD 135

Parker Slimfold, England, c.1962, chancellery red, gold filled clip and band with Vs pattern, aerometric filling, sac with excellent transparency, original gold nib Parker 14 Kt England 5, flexible broadish medium point with very good iridium, on the barrel imprint Parker Slimfold made in England. Lenght closed 4 15/16”, posted 5 11/16”. Excellent #1486 $USD 70

Parker Slimfold, England, c.1962, imperial blue, gold filled clip and band with Vs pattern, aerometric filling, interesting solid gold nib 14 Kt Parker England, semiflex broad stub point with big iridium, on the barrel imprint Parker Slimfold Reg. T.M. made in England. Lenght closed 4 15/16”, posted 5”, 12,0 cm. Excellent #1114 $USD 80