"FA" denotes Pilot's Falcon-family flex nibs, and the 743 carries the larger of the two FA nib sizes Pilot offers (the other being the 912 FA). The larger nib generally suits a lower, more natural pen angle and is more forgiving for a writer still developing consistent pressure control at full flex — which makes it the more approachable of the two true-flex Custom pens, even though both are aimed at an already-experienced flex writer rather than a beginner.
Honest Note:
Who is it For?
FREQUENTLY ASKED QUSTIONS (FAQ)
How is this different from the Pilot Falcon?
The Falcon is Pilot's "soft" nib — gently pressure-responsive, but built to resist over-flexing, which makes it the safe place to learn the skill. The 743 FA is true flex: the tines genuinely spread under pressure for dramatic width change, and it can be damaged by the same heavy-handed technique the Falcon is designed to tolerate.
743 FA or 912 FA — which should I choose?
The 743's larger nib suits a lower, more natural writing angle and is generally the more forgiving of the two for someone newer to true flex. The 912 suits a steeper angle and a writer already comfortable with flex technique. Neither is "better" — they suit different natural hand positions.
What's railroading, and will I run into it?
Railroading happens when the tines spread too far for the ink flow to keep up, leaving two parallel unfilled lines instead of one filled stroke. It's the most common complaint with any true flex nib and is a technique issue, not a fault — a wetter ink and a slightly less aggressive flex usually resolves it.