Inktend / Pen library / 700 (Geha-Boy)
Geha
700 (Geha-Boy)
A model in Geha's fountain pen lineup. Specs below reflect the typical configuration across Geha's core range.
Priced squarely in first-pen territory — low enough that trying fountain pens for the first time doesn't feel like a gamble.
Specs
About Geha
Geha-Werke (short for Gebrüder-Hartmann-Werke) was a Hannover stationery and office-supply manufacturer founded in 1918 by the brothers Heinrich and Conrad Hartmann. From 1950 it made the first German fountain pen to use an ink cartridge and became Pelikan's chief rival in the school-pen market, with a distinctive proprietary cartridge and a slider-operated 'reserve tank' that released a small extra supply of ink. The company was taken over by Pelikan in 1990 and its pens are now only found on the second-hand market.
How to fill the Geha 700 (Geha-Boy)
Fill it two ways: snap in a pre-filled international cartridge for convenience, or use a converter — a small plunger or twist mechanism that installs the same way a cartridge does — to draw ink from any bottle. The converter route opens up the entire world of bottled ink, which is where most of the hobby's color variety lives.
Choosing a nib size
Nib size determines line width, not writing pressure — fountain pens are meant to glide, never press. Extra-fine (EF) suits small, dense handwriting and thin paper; fine (F) is the most broadly recommended default; medium (M) shows more ink character and shading; broad (B) and stub grinds favor bold, expressive strokes and calligraphy-adjacent writing. The 700 (Geha-Boy)'s gold nib will also flex slightly with pressure, giving line variation that a steel nib of the same size won't produce.
Keeping it clean
A quick flush with cool water every time you switch ink colors — and a full clean every 4–6 weeks of regular use — is enough to keep the nib and feed performing well. Inktend's cleaning reminder is tuned to a 21-day baseline and adjusts naturally to how often you actually refill.
Pairing inks with the 700 (Geha-Boy)
Because refills are quick with a cartridge or converter, this is a good pen for rotating through several colors rather than committing to one; sample vials work especially well here.
Frequently asked questions
More from Geha
Specs reflect the typical configuration across Geha's core lineup rather than this exact model — check current listings before buying.