Pen & Paper
Specimen The Pen Archive Search ⌘K

Nib
Filler
Flow
Weight
Material
Length
№ 01 · Attributes

Every dimension, measured.

The full reading of the specimen, grouped by concern. Spectrum dots place the specimen on the catalogue's scale.
Identity & Provenance i.

Where the specimen was made, by whom, and which generation it belongs to.

MakerPilot Corporation
ModelCustom 823
VariantAmber Demonstrator
Year introduced1992
GenerationCurrent — 2017 revision
EditionRegular production
CountryJapan
CityHiratsuka, Kanagawa
Archive number№ 003 / 172
StatusIn production · readily available
The Nib ii.

The metal between the writer and the page — its size, shape, material, and how willingly it bends.

Material14k yellow gold
Gold purity58.5 % (585 fineness)
PlatingRhodium-masked face
Tipping alloyOsmiridium · IPG grade 3
Tipping shapeSpherical · hand-polished
Size (designation)Medium M
UEFEFFMBBBBBB
Tip width, measured0.55 mm
Tip shapeRound
Custom grindNone — stock
FlexSoft
RigidSemi-flexFlexWet noodle
Line variationModerate
NoneSlightModerateMarked
Designation №#5 (manufacturer)
Total nib length24.0 mm
Tine length (exposed)9.5 mm
Slit length6.8 mm
Breather holeYes — round, 0.8 mm
Two-toneNo
Imprint sideObverse — face-up
DecorationScroll engraving · shoulders
Engraving"Pilot · 14k · 585"
Ink Delivery iii.

How the pen takes ink, holds it, and releases it under the nib.

Filling systemVacuum (vac-fill)
Cartridge standardProprietary · Pilot CON-70 only
Capacity2.0 ml
Capacity, in pages~ 32 A5 pages (M nib)
Fill strokeSingle plunger · 90 % primed
Prime time~ 6 seconds
Shut-off valveYes — close to fly
Feed materialPlastic, finned
Feed visibilityVisible through demonstrator
Ink windowWhole barrel — ink level read at a glance
FlowWet · generous
DryMediumWetSopping
Hard startsRare
SkippingNone observed
Dry-out uncapped5–7 days
Body & Trim iv.

What the pen is made of, how it closes, and how light passes through it.

MaterialAcrylic resin
Density1.18 g / cm³
FinishPolished
ColourTranslucent amber
TranslucencyDemonstrator — full
TrimGold-plated brass
FinialResin dome · gold accent ring
ClipSprung · arrow-form
CapScrew · 1.75 turns
Cap threadsTriple-start · 28 TPI
SectionBlack resin · tapered
Section threadsSmooth · negligible
Cap interiorInner cap · silicone seal
Dimensions & Weight v.

Every measurement in millimetres and grams, against the archive's range.

Length, capped149.5 mm
120140160180
Length, uncapped131.0 mm
105125145165
Length, posted156.0 mm
130150170190
Grip diameter10.7 mm
Max diameter14.5 mm
Cap length62.5 mm
Barrel length112.0 mm
Balance point52 % from nib · unposted
Weight, capped29 g
15253545
Weight, uncapped19 g
Cap only10 g
Weight, posted31 g
15253545
Heritage & Lineage vi.

Designer, year released, the family the pen belongs to, and what came before it.

DesignerAnonymous · Pilot R&D
Year designed1992
Year released1992 · current generation 2017
PredecessorCustom 743 vacuum-filler
FamilyPilot Custom series
Sister modelsCustom 845 · Custom 743 · Custom Heritage 92
Limited editionsNone of this barrel — model has had four
Original MSRP¥ 30 000 (1992)
Notable ownersReported among Akutagawa-shortlisted novelists
Service & Provenance vii.

Warranty, repair channels, the boxed contents, and where the world stocks it.

Warranty1 year · international
Service networkJP · US · DE · UK · IT (5 centres)
Nib exchangeBy return — no swap
Spare nib unit¥ 12 000 · 6 weeks lead time
Country of designJapan
Country of assemblyJapan (Hiratsuka)
Boxed contentsPen · silicone grease · cleaning cloth · manual
Converter includedN/A — vacuum-fill
Ink sampleNo
CertificateNo · regular production
Ergonomics & Character viii.

How it sits in the hand — and the editor's reading of its temperament after a month at the desk.

PostabilityGood
Section shapeCylindrical, slight taper
Threads at gripSmooth, low-set
BalanceForward · unposted
Left-hand friendlyYes — dry-time permitting
Travel-friendlyYes — valve closes
Smoothness9 / 10
ScratchyGlassy
Wetness8 / 10
Bone-drySopping
Feedback4 / 10
SilentSinging
Hand-friendliness9 / 10
Hot-spotAll-day
Best uses
Correspondence Journaling Long-form Margin notes
Mood
Contemplative Workmanlike
Avoid for
Quick notes Glossy paper

Editor's note · M. Hoshino

A pen that hides its engineering inside a barrel that looks, at first, like a curio. The vacuum's shut-off valve is the reason it survives travel; the soft 14k medium is the reason it survives a long letter.

Recommended inks

  • Iroshizuku Tsuki-yo№ 014
  • Sailor Yama-dori№ 028
  • Diamine Oxblood№ 041
  • Pilot Iro-utsushi Take-sumi№ 022

Notable owners

A long-standing favourite of Japanese novelists and English translators — present, by report, at the writing of more than one Akutagawa-shortlisted manuscript.

№ 02 · On the Page

The same pen, on three different papers.

All samples in Iroshizuku Tsuki-yo, posted grip, indoor 2700K.
№ 03 · Recommended Marriages

Pairings in which the 823 appears.

From the catalog. Listed by affinity.