(Sold) This is a mid-1940s White Dot Sheaffer Triumph Craftsman Vac fountain pen in striated Carmine celluloid, with gold-filled trim, and a 14k gold, two-tone Lifetime Triumph Fine nib. The pen has been restored, which included a complete disassembly, a gentle cleaning, an overhaul of the filling mechanism, ink flow adjustment, a nib tune-up, and a gentle polish with a soft cloth (by hand). This is a medium-size pen measuring a little over 5" capped and 0.44" in diameter. It posts very well, and writes a true-to-size Fine line of about 0.4 mm, so it's possible it sold as a Medium.
One of the most intractable problems that a fountain pen designer must try to solve is handling the expansion of ink due to changes in temperature and pressure. Today, sadly, but understandably, most pen makers focus on aesthetics rather than engineering aspects of pen design, and, as a result, most pens made today employ a similar, simple method of regulating flow, i.e., a plastic (or, rarely, ebonite) feed with a relatively larger surface area and one (sometimes two) channels. As a result, modern pens are not particularly good at dealing with ink flow fluctuations, particularly those due to changes in temperature. We keep hearing stories of pens "exploding," leaking, burping, when the temperature or atmospheric pressure go up or down by a significant amount.
In the early 1940s, Sheaffer brought to market its own solution to regulating ink flow, the Triumph system. The Triumph solves the ink expansion problem by providing an oversize ebonite feed with a larger surface area and one larger channel that runs inside it. The feed is enclosed inside a cylinder made of 14k gold, which offers an additional buffering capability and further protects the system against external factors, such as drying out. By today's standards, the Triumph is "ahead of anything in the field" despite predating modern pens by more than half a century.
What this means to us, writers, is that a Triumph pen is going to give us that silky smooth, well-controlled, generous, steady, and delightful flow of ink, regardless of atmospheric conditions, and will be resilient against quirks of ink, paper, and writing technique. The pen I'm offering today is a great specimen of the Triumph, in fantastic condition, and made of the highly coveted Carmine celluloid. And, it's priced well below most modern pens of comparable features and performance.
The nib, which probably sold as a Medium, lays down a generous Fine line of about 0.4 mm (on my paper). The oversize feed keeps the flow steady and consistent. The nib is firm but feels smooth and soft on paper, thanks to its ingenious upturned design and the vibration dampening properties of the gold point. Cosmetically, it's great! The gleaming, vibrant Carmine celluloid is so gorgeous, and irresistibly so. The gold-filled trim is in equally great shape. The imprint is strong.