Montblanc 146 1952-1954, Black Celluloid GPT, #6 14C OBB

HM2602009

📒 History/Provenance

The Montblanc 146 was introduced in 1952 as a full redesign of the postwar 146G, marking the beginning of what would become Montblanc's most enduring piston filler line. This pen dates to the very early production window — 1952 to 1954 — distinguishable by its telescopic piston mechanism, in which the inner piston tube physically extends and retracts as the knob is turned. This feature was phased out in later production as Montblanc simplified the assembly, making first-run examples mechanically distinct from every 146 that followed.

The body is black celluloid — not resin — a period-correct material that carries genuine depth and luster when properly maintained and restored. The gold-plated trim (GPT) and matching piston knob carry crisp model and nib imprints, consistent with top-tier early production quality. The nib is stamped with the iconic "4810" imprint (the elevation of Mont Blanc in meters).

The oblique broad-broad (OBB) grind is one of the rarest factory nib specifications from this era. Montblanc produced oblique nibs in small numbers for European correspondents and calligraphers who preferred a more natural wrist angle in formal writing. These were not standard catalog items in most markets and are seldom found in this condition.

🧪 QA & Recommendation

At 250g of pressure, this is a true flex nib. The nib responds to the lightest intentional pressure and rewards a trained hand. Snapback is clean and controlled for a nib this soft, with no ghosting or spring fatigue detected after extended writing sessions.

The oblique grind does two things at once. First, it allows you to write at a natural 90-degree wrist angle — no need to splay your hand or drop into a formal copperplate posture — while the oblique cut aligns the contact point correctly to the downstroke direction. Second, and more interestingly, rotating the pen slightly counterclockwise in hand shifts the writing character toward a cursive italic stub, sharpening the cross-stroke contrast and adding expressive edge definition without any additional pressure. Very few nibs give you two distinct writing modes in one grind.

The line range — 0.30mm hairline to 2.31mm full flex — is the widest factory specification I have documented from the 1952–1954 production era on a 146. The 7.7x multiplier is exceptional even by vintage standards. This nib is best suited for intermediate to advanced flex writers who want an expressive grail-tier nib in a reliable, full-sized piston filler platform. Not recommended for beginners due to flex sensitivity.

Tested on Rhodia 80 gsm with Pelikan 4001 Brilliant Black.

🔧 Restoration Commentary

Crisp model number and nib imprints on piston knob; minor wear on gold-plated trim consistent with age.
Ink window fully transparent.
Black ebonite section rejuvenated and hand polished, "softness" of ebonite restored.
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.