Parker Duofold Senior Streamline, Sea Green and Pearl Celluloid GPT, #6 18k Flex

The streamlined Duofold replaced the squared flat-top in 1929. This is the Senior in Sea Green and Pearl: green and white pearl celluloid striped through with translucent veins, considerably more vivid in person than the Lapis or Burgundy that survive more commonly. The 18ct nib stamp and the Canadian "Pen 18ct Canada" marking place this in the late 1944 Canadian run, when Parker Canada was still pushing export pens into the French market. US production ran from 1929 until 1933 or 1934, while Canadian production continued the design into the late 1940s, and the Canadian and English nibs from this window tend to be the bouncier of the two.

That bounciness shows here. The #2 lays a 0.35mm fine baseline that opens to 1.80mm at 330g Super Flex pressure, a clean 5.1x line variation, with a slight cursive italic character in the tipping (0.35mm horizontal hairlines, 0.50mm vertical downstrokes). The Christmas-tree feed runs wet and keeps up with the snapback. It writes best with a relaxed grip and shows good ink saturation on fountain-pen-friendly paper.

Complete celluloid restoration, with the barrel and cap deinked back to original color. Ebonite blind cap and collar restored. Nib and feed tuned for flow at full deflection. Button-filling mechanism rebuilt with a fresh latex sac and tested with water.

Tested on Rhodia 90gsm ivory with Pelikan 4001 Brilliant Black.