The IWC that made complexity look effortless
How the Portugieser Chronograph Rattrapante turned one of watchmaking’s most demanding complications into something beautifully simple
Some complications reveal themselves immediately. A perpetual calendar fills the dial with information, a tourbillon quite literally puts its mechanics on display, and a minute repeater announces what it can do the moment its mechanism is activated. The rattrapante is different. At first glance, the IWC Portugieser Chronograph Rattrapante looks remarkably restrained: two subdials, elegant Arabic numerals, slender hands and the expansive proportions that have defined the Portugieser for generations. Only when the chronograph starts does the secret reveal itself. What appeared to be one central seconds hand is actually two.
That contrast between visual simplicity and mechanical ingenuity is what makes this watch so compelling. IWC did not merely add a complicated mechanism to the Portugieser. It found a way of making that complication feel as though it had always belonged there.
A watch born from an unusual request
The story of the Portugieser reaches back to the late 1930s, when two Portuguese businessmen approached IWC looking for something rather unconventional: the accuracy and presence of a marine chronometer, but in a wristwatch. At a time when men’s watches were generally much smaller, IWC’s solution was audacious. The company placed a large, high-quality pocket-watch movement inside a wristwatch case.
The first reference 325 models appeared around 1939, and their generous proportions were strikingly unusual for the period. What began as a pragmatic answer to an unusual request unintentionally created a design language that would look remarkably contemporary more than half a century later.
The Portugieser remained an unusual and relatively niche part of IWC’s history for decades. Its major revival came in 1993, when IWC celebrated its 125th anniversary with the Jubilee Portugieser reference 5441. The reception demonstrated that the proportions once considered oversized had finally found their moment. Two years later, IWC introduced the Portugieser Chronograph Rattrapante, bringing the chronograph complication into the Portugieser family for the first time. IWC itself continues to identify the 1995 Rattrapante as the starting point for the Portugieser chronograph lineage.
What does “rattrapante” actually mean?
This is where the watch becomes considerably more interesting.
The word rattrapante comes from the French verb rattraper, meaning “to catch up.” It is an unusually literal name for what happens inside the watch.
Start the chronograph and the two central seconds hands move together, perfectly superimposed so that they appear to be a single hand. Press the additional rattrapante pusher and one hand stops while the other continues its journey around the dial. This allows two events that begin simultaneously to be timed independently—for example, two cars completing different laps of the same race.
Press the pusher again and the stationary hand races forward to catch up with the first.
Rattrapante.
Once you know what the word means, the complication suddenly becomes wonderfully intuitive. What initially sounds like obscure watchmaking terminology turns out to describe exactly what your eyes see happening on the dial.
Traditional split-seconds chronographs are notoriously difficult to construct because the movement must control two chronograph seconds hands independently while allowing them to separate and reunite repeatedly without disrupting the underlying timing mechanism. For much of watchmaking history, that complexity made the rattrapante the territory of extremely expensive haute horlogerie.
IWC approached the problem differently.
Richard Habring and a clever solution to an expensive problem
The mechanism behind the Portugieser Rattrapante is closely associated with watchmaker Richard Habring, who was working for IWC at the time. Rather than constructing an entirely new split-seconds calibre in the traditional manner, the engineering solution used a robust hand-wound Valjoux architecture as its foundation and added an ingenious split-seconds mechanism. Contemporary collector discussions likewise attribute the split-seconds construction to Habring during his years at IWC.
That distinction matters because the achievement was not complexity for complexity’s sake. The cleverness lay in finding a more rational way to deliver a complication traditionally associated with exceptionally elaborate and costly movements.
In the Portugieser Chronograph Rattrapante, that engineering resulted in calibre 76240, based on the hand-wound Valjoux 7760 architecture and modified with the split-seconds mechanism. The approach made a genuine rattrapante available in a watch that could be produced and maintained on a very different basis from the bespoke split-seconds chronographs that had historically defined the complication.
This is one of those moments in horological history where innovation is better measured by simplification than multiplication. IWC took something difficult and asked whether all that difficulty was really necessary.
Complexity without a complicated dial
Perhaps the greatest achievement of the Portugieser Chronograph Rattrapante is that none of this engineering overwhelms the watch itself.
The vertical arrangement of the registers leaves the dial remarkably open. Elongated Arabic numerals, a fine railway-style minute track and slender hands retain the visual vocabulary of the historical Portugieser, while the chronograph functions integrate into the design rather than dominating it. Even IWC’s modern description of the Portugieser Chronograph traces this characteristic vertical register arrangement back to the Rattrapante introduced in 1995.
This restraint becomes particularly impressive when viewed in context. During the 1990s, mechanical watchmaking was rediscovering its confidence after the quartz crisis, and complicated mechanical watches were once again being used to demonstrate what traditional watchmaking could achieve. The obvious temptation would have been to make the complication visible everywhere.
IWC did almost the opposite.
Without operating the chronograph, someone unfamiliar with the watch might never realise what is hiding underneath the dial. That makes discovering the second chronograph hand all the more satisfying. It is almost a private complication: spectacular when understood, but never dependent upon being noticed.
The watch that shaped what came next
The significance of the Rattrapante extends beyond the reference itself. Its design became the foundation for the Portugieser Chronograph that followed and helped establish an aesthetic that remains recognisable in IWC’s collection decades later. Hodinkee likewise identifies the 1995 reference 3712 as the foundational design from which the later Portugieser Chronograph developed.
That gives the watch an unusual position in IWC history. It was simultaneously a technical experiment and a design blueprint. The more commercially familiar Portugieser Chronograph that came afterwards simplified the mechanical proposition, but retained much of the visual balance established by its more complicated predecessor.
Seen from that perspective, the Rattrapante is not an exotic variation added later to a successful chronograph. The chronology runs the other way around: the Rattrapante came first.
That is perhaps one of the most memorable details in its story. The complicated watch was the starting point.
About this watch
The example presented here captures precisely what makes the original Portugieser Chronograph Rattrapante so attractive. Its appeal does not depend upon making its mechanical complexity immediately visible. Instead, the clean dial, classical numerals, generous proportions and carefully balanced registers allow it to function first as an elegant Portugieser and only then reveal itself as something considerably more unusual.
That distinction becomes important when considering the watch as a collectible object. A rattrapante mechanism could easily have resulted in an excessively technical-looking watch, yet here the complication is almost hidden in plain sight. The additional central hand and rattrapante control are there for those who know where to look, while the overall composition remains remarkably calm.
It therefore offers two experiences at once. To someone seeing it across a table, it is a beautifully proportioned IWC. To the person wearing it, it contains one of mechanical watchmaking’s most fascinating chronograph functions—and an important piece of the history that established the modern Portugieser Chronograph.
Closing thoughts
There is an appealing irony at the heart of the IWC Portugieser Chronograph Rattrapante. Its most impressive achievement is something it makes remarkably easy to miss.
The watch belongs to a category of complications traditionally celebrated for their difficulty, yet IWC’s contribution was to make that difficulty more rational mechanically and almost invisible aesthetically. Even the name tells the story perfectly: one hand stops, the other continues, and with the push of a button the first catches up again.
Perhaps the best way to understand this watch is therefore not as a Portugieser to which IWC added a rattrapante, but as the watch through which IWC discovered what a Portugieser chronograph could be. The complication that appears to be its most extravagant feature ultimately became the starting point for one of the manufacture’s most enduring modern designs.
Sometimes the most complicated part of a watch is not what defines its appearance.
It is what explains why that appearance exists at all.
See the watch featured in this story
The IWC Portugieser Chronograph Rattrapante featured in this article is currently available at ChronoMasters. View the watch, its condition, photographs and full product details.
View this IWC Portugieser Chronograph Rattrapante
