Moons of Jupiter fountain pen : Io

This is the fourth in the series: The Moons of Jupiter, and represents what we think Io might look like, with Jupiter in the background.

This pen has mottled yellow/gold moons with a dash of sparkle. The grip section is likewise a streaky, mottled gold/bronze/yellow with some inner sparks, representing Io’s constant eruptions. The main body is as black as space.

Io (pronounced eye-oh) is a bit bigger than Earth’s moon, but much more active with volcanoes spewing lava miles high above its surface. Some of these eruptions are so powerful they can even be seen with powerful telescopes from earth. The planet’s crust is believed to be made up mostly of molten sulphur and some silicates, which explains its bright yellow, mottled appearance.



Dainty Dafoe Model.

Series: The Moons of Jupiter.


Black resin with an exceptional sheen, with semi-translucent, mustard/yellow/gold/bronze. The grip section is made from the same mottled yellow as the moons.


Jowo #6 in polished steel, or Bock #6 in polished steel or bicolour (shown in these photos i.e. steel and gold-plate.) Please select Fine, Medium or Broad in the check-out. (Please DM me if you need an Extra Fine.)

Refill type:

Standard international fountain pen converter (supplied) or ink cartridge.


Total length (closed): 137 mm (5.4″). Length (pen only, no cap): 131 mm (5.1″). Diameter at widest point (excl. cap): 15.1 mm (0.6″). Diameter of section at narrowest point: 10,3 mm (0.4 “).  Cap thread: 13 mm (0.51″).


Within South Africa, we offer a flat rate of R125 for couriering smaller items.

International shipping is via a courier or express postage with a tracking number and should take around 10 – 20 working days. Pens are securely packed and insured.

Please use the checkout to see the shipping cost for your location.