Montblanc 146 1952, Grey Striated Celluloid GPT, #6 14C Bi-Tone EF Nib

HM2603003

📜 History & Provenance
In the early 1950s, Montblanc introduced its line of 14X Meisterstück models manufactured in both black celluloid (with a striped ink window) and lined celluloid (without a separate ink window). The lined celluloids came in green and grey. Green was produced in two shades — light green and sage green, the former rarer than the latter. Grey is the rarest of the three colorways. While the black models scaled up to the large 149, the lined celluloid series topped out at the 146 as the largest model.

This pen's longer-than-typical ink window area and flat grooved ski-slope ebonite feed place it among the earliest 1952 productions. The celluloid 146 was first fitted with Montblanc's innovative telescopic piston — a two-stage mechanism that collapses into itself, promising roughly double the ink capacity of a conventional piston. Only the top-tier 13X, 14X, and 24X models received the telescopic mechanism.

The barrel carries a fully legible "Made in Germany" imprint — mint, with no wear to the stamping. The cap band reads "Montblanc Masterpiece," identifying this as an export-market pen. The piston knob is imprinted with "JB," "146," and "EF." According to vintage Montblanc authority Osman Sümer (via direct correspondence), the "JB" imprint indicates an importer "Jhaveri Bazaar" based in Mumbai, India.

The celluloid is entirely transparent in its striations, running the full length of the windowless barrel. The nib was dipped for testing only — the celluloid is incredibly clean with no ambering, no discoloration, and no signs of use. It is difficult to characterize this pen as anything other than new old stock, likely from a liquidated retail inventory or a private collector's pen case.

🧪 QA & Recommendation

At 250g, this is a semi noodle flex — supple enough to produce dramatic line variation on demand, yet controlled enough for extended daily writing without fatigue. The 5.03x multiplier (0.30mm hairline to 1.51mm full flex) places this comfortably in expressive territory: the EF hairlines are crisp and precise, and the flex strokes open to a generous 4B with beautiful ink shading and line definition.

This nib is extraordinarily juicy for an EF — ink control is impeccable, with no skipping, no hard starts, and no railroading across sustained writing sessions. The tines are soft and flexible with supple nib tipping that glides across the page. Snapback is immediate and clean. The writing experience is remarkably smooth for a vintage EF, a testament to the quality of Montblanc's 1950s nib work.

This is a museum-grade example of one of the rarest colorways in the celluloid 146 family. The grey striated celluloid in NOS condition is an exceedingly uncommon find — most surviving examples show significant ambering or wear. Recommended for serious Montblanc collectors, vintage flex enthusiasts, and anyone seeking a grail-tier writing instrument with both provenance and performance.

Tested on Clairefontaine 90 gsm, inked with Pelikan 4001 Brilliant Black.

🔧 Restoration Commentary

• Crisp model number and nib imprints on piston knob; minor wear to gold-plated trim consistent with age.
• Celluloid in exceptional condition — no ambering, no discoloration, fully transparent striations.
• Windowless striated barrel with full-length transparent stripes.
• Cap band "Montblanc Masterpiece" imprint fully legible.
• "Made in Germany" barrel imprint mint.
• Creamy ivory celluloid Montblanc snow star on cap top.
• Coated with carnauba wax to shield from moisture, UV, and celluloid crystallization.
• Pen fully disassembled and cleaned thoroughly, with new piston seals installed and lubricated.
• Nib heat set and tuned for smoothness.