The Definitive Guide to
#6 Jowo Nib Fountain Pens
A curated reference of fountain pens equipped with the world's most popular interchangeable nib unit — the JoWo #6.
The JoWo #6 is the industry-standard nib unit used by dozens of brands worldwide. Its 6 mm feed diameter, screw-in housing, and consistently smooth tipping make it the most versatile and swappable nib on the market. Below is a comprehensive brand-by-brand directory of production fountain pens that ship with a genuine #6 JoWo nib.
Conklin
United StatesAll American
Classic American flat-top silhouette in acrylic resin. Available with steel or 14K gold JoWo nibs.
Cartridge / ConverterDuragraph
Best-selling entry pen with bold swirl acrylics. Steel JoWo nib including Omniflex option.
Cartridge / ConverterEmpire
Art Deco-inspired design with geometric patterns and polished chrome trim.
Cartridge / ConverterHerringbone
Textured herringbone pattern on a classic cigar-shaped body. Elegant and tactile.
Cartridge / ConverterNozac
Heritage piston-filler revived with modern JoWo nib. Large ink capacity, vintage profile.
PistonDiplomat
GermanyAero
Zeppelin-inspired aluminium body with groove depressions. Snap cap, JoWo #6 steel nib. Multiple finishes.
Cartridge / ConverterMagnum
Oversized, comfortable grip section with a soft-touch finish. Excellent everyday writer.
Cartridge / ConverterElox
Sleek anodised aluminium body in vibrant colours. Lightweight and reliable daily companion.
Cartridge / ConverterEdison Pen Co.
United StatesBeaumont
Handmade in the USA. Pneumatic filling system, generous ink capacity, smooth taper.
PneumaticCollier
Cigar-shaped body in custom acrylics. Cartridge/converter with #6 JoWo nib.
Cartridge / ConverterMenlo
Flat-top design with a comfortable posting length. Available in stunning acrylics.
Cartridge / ConverterPremiere
Edison's flagship line — full-size, beautifully finished, available in custom pour resins.
Cartridge / ConverterEsterbrook
United StatesEstie
1930s-inspired acrylic in collector-favourite colourways. Also accepts vintage Esterbrook nibs via MV adapter.
Cartridge / ConverterEstie Oversized
The larger sibling — same beautiful acrylics with a more substantial feel in hand.
Cartridge / ConverterModel J
Lever-filler homage to the vintage J series. JoWo #6 nib on a wonderfully nostalgic silhouette.
LeverFranklin-Christoph
United StatesModel 02 Intrinsic
Pocket-friendly cigar shape. Available in steel, 14K gold, and signature S.I.G. grinds.
Cartridge / ConverterModel 20 Marietta
Flat-top design with a generous barrel. Known for superb custom nib options by Nagahara.
Cartridge / ConverterModel 31 Omnis
Slim, elegant profile. One of the most popular FC models for everyday writing.
Cartridge / ConverterModel 46 / p66
Full-size pens with a broad range of #6 JoWo nibs including S.I.G., needlepoint, and cursive italic.
Cartridge / ConverterKaweco
GermanyDIA2
Full-size pen with a classic chrome-trimmed design. JoWo #6 nib — unlike the Sport which uses #5.
Cartridge / ConverterStudent
Retro 1970s-inspired design with a clip and pocket-friendly profile. JoWo #6 nib.
Cartridge / ConverterLeonardo Officina Italiana
ItalyMomento Zero
Flagship model in stunning Italian resins. Flat-top cap, generous barrel. Multiple trim options.
Cartridge / Converter or PistonMomento Magico
Oversized sibling of the Momento Zero with bolder resin patterns and a magnetic cap.
PistonFurore
Accessible entry to the Leonardo line. Vibrant resins and smooth JoWo #6 nib.
Cartridge / ConverterMessenger
Mid-range model bridging the Furore and Momento lines. Clean design, multiple finishes.
Cartridge / ConverterMonteverde
United StatesRegatta
Bold resin designs including Mother of Pearl editions. Colour-coordinated JoWo #6 nib.
Cartridge / ConverterInnova
Reliable workhorse with JoWo #6 steel nib including Omniflex option. Great starter pen.
Cartridge / ConverterRitma
Lightweight anodised aluminium. Available in vivid colours with Omniflex nib option.
Cartridge / ConverterInvincia
Durable carbon fibre or colour finish barrel. Substantial feel with snap cap.
Cartridge / ConverterSuper Mega
Oversized barrel for a comfortable grip. Available in carbon fibre and resin finishes.
Cartridge / ConverterImpressa
Gun metal or chrome-plated brass body with a clean executive look.
Cartridge / ConverterNahvalur (formerly Narwhal)
Pakistan / United StatesOriginal
Ebonite-like resin with piston fill and excellent ink capacity. In-house tuned JoWo #6 nib.
PistonOriginal Plus
Vacuum filler with 1.5 ml capacity and a translucent ink-swirl body. Glassy-smooth nib.
VacuumSchuylkill
Piston-fill with unique colour blends. Named after the Philadelphia river.
PistonNautilus / Voyage / Horizon
Ocean-themed collections with distinctive resin patterns and JoWo #6 nibs throughout.
Piston / VacuumOpus 88
TaiwanDemonstrator
Full demonstrator with massive ink capacity. Eyedropper with shut-off valve. A community fan favourite.
Eyedropper (valve)Omar
Colourful acrylic body with the same shut-off valve system. Slightly slimmer than the Demo.
Eyedropper (valve)Jazz
Streamlined design, great ink capacity, excellent value for a JoWo #6 eyedropper pen.
Eyedropper (valve)Koloro / Minty / Heart of Sutra
Special editions and themed releases — all using the same trusted JoWo #6 nib platform.
Eyedropper (valve)Osprey Pens
IndiaScholar / Milano / Madison
Affordable pens with JoWo-compatible #6 nib units. A strong value entry to the JoWo ecosystem.
Cartridge / ConverterPenlux
TaiwanMasterpiece Delgado
PMMA acrylic body with gold-plated JoWo #6 nib. Piston filler. Stunning colour range.
PistonMasterpiece Grande
Oversized version of the Masterpiece line. Available with optional 14K or 18K gold JoWo nibs.
PistonScribo
ItalyLa Dotta
Hand-finished resin by former OMAS craftsmen. Available with 14K flex or 18K gold JoWo #6 nibs.
PistonFeel
Slightly more compact than La Dotta. Same artisanal quality with JoWo #6 nib platform.
PistonTWSBI
TaiwanVac700R
Vacuum-fill demonstrator with JoWo #6 nib. Large ink capacity. Screw-on nib unit is easily swappable.
VacuumOther Notable Brands
VariousGioia (Italy)
Italian-made pens with vibrant acrylic bodies and JoWo #6 nibs. Select models.
VariesMontegrappa (Italy)
Premium Italian manufacturer using JoWo #6 nibs on select contemporary models.
Piston / C / CStipula (Italy)
Florentine pen maker. Select models feature JoWo #6 steel or gold nibs.
VariesRanga (India)
Hand-turned ebonite and acrylic pens with JoWo #6 compatibility. Outstanding value for the material.
Eyedropper / C / CRosetta
Budget-friendly pens with genuine JoWo #6 nib units. An excellent value proposition.
Cartridge / ConverterArtisan & Custom Pen Makers
Hundreds of independent pen turners use JoWo #6 nib units, including many on Etsy and at pen show circuits.
VariesRetro & Vintage-Inspired Pens
A curated spotlightThese pens are united by a single philosophy: the romance of a bygone era, realised with a modern JoWo #6 nib. From lever-fill revivals to crescent-filler heritage models and hand-turned hard rubber — writing instruments that look back, and write beautifully forward.
Conklin Mark Twain Crescent Filler
A faithful revival of the iconic 1898 crescent filling mechanism — the world's first practical self-filler. JoWo #6 nib on a design that predates most pen brands.
Crescent FillerConklin Nozac
A piston-fill revival of Conklin's 1930s Nozac line. Distinctive cylindrical profile, solid vintage DNA, and a reliable JoWo #6 nib under the hood.
PistonEsterbrook Model J
A loving recreation of the lever-fill J that defined American writing in the mid-20th century. The lever mechanism is authentic — and the JoWo #6 nib writes like a dream.
LeverEsterbrook Estie
A 1930s silhouette reimagined in spectacular modern acrylics. The ringless barrel, snap cap, and bold colourways are quintessentially vintage in spirit.
Cartridge / ConverterConklin All American
The flat-top silhouette — borrowed from America's golden age of pens — with a boldly modern acrylic body. Available with the full JoWo #6 nib range.
Cartridge / ConverterFranklin-Christoph Model 20 Marietta
American flat-top craftsmanship at its finest. Made by hand in small batches, this pen carries the proportions and soul of a 1940s Vacumatic with a modern #6 JoWo nib.
Cartridge / ConverterRanga Ebonite Eyedroppers
Hand-turned from genuine ebonite — the original pen material — these Indian-made eyedroppers carry a material tradition stretching back to the 19th century. JoWo #6 nib throughout.
EyedropperKaweco Student
A retro 1970s silhouette revived in bold colourways. The Student's wide barrel and vintage clip echo an era of optimistic design — matched with a smooth JoWo #6 steel nib.
Cartridge / ConverterConklin Empire
Art Deco geometry meets the JoWo #6 ecosystem. The Empire's faceted patterns and chrome trim are direct descendants of the 1930s desk pen aesthetic.
Cartridge / ConverterScribo La Dotta
Born from the hands of former OMAS craftsmen in Bologna, La Dotta carries the spirit of Italy's golden age of pen-making. Available with 14K flex or 18K gold JoWo #6 nibs.
PistonNahvalur Original
Ebonite-like resin with a piston fill mechanism — the most beloved filling system of the vintage era. Clean lines, rich colours, and a carefully tuned JoWo #6 nib.
PistonOpus 88 Demonstrator
Demonstrators — pens with transparent bodies to reveal the ink — were a 1930s novelty that never went out of style. The Opus 88 brings that tradition to the JoWo #6 with a clever eyedropper valve system.
Eyedropper (valve)
