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In-Depth: The IWC Doppelchrono Reference 3711 -

In-Depth: The IWC Doppelchrono Reference 3711 –

From from the beginning in my days covering watches, something I have appreciated about IWC was what I came to see as its crudeness. How did IWC reliably offer solid complications for a negligible portion of the costs seen from set up haute horlogerie brands? What I would before long learn was that IWC had a small bunch of watchmakers and designers who had a talent for moving toward long-existing complications in completely novel manners. Some time before it turned into a showcasing force to be reckoned with binds to film and sports, IWC was a worth situated authority’s image. It made a ceaseless schedule, a split-seconds chronograph, and even an amazing complication – and it constructed these complications on the foundation of the humble Valjoux 7750. 

At the time, IWC was driven by the amazing Günter Blümlein, and he thusly drew on elite of watchmakers that watch sweethearts appropriately view as unbelievable. Simply examine the names appended to IWC licenses from this time  –Renaud, Papi, Klaus, and, obviously, Habring. As far as I might be concerned, glancing in from an external perspective, an ethos of making conservative and worked on advances inside conventional watchmaking appeared to be heated into the company. For this we can say thanks to Blümlein, however also Kurt Klaus, who built up IWC’s interminable schedule. We can likewise say thanks to Richard Habring, an IWC alum, who now, with his significant other Maria, runs an eponymous watchmaking company situated in Austria . Today we will investigate what is presumably Richard Habring’s most significant watchmaking commitment to date: the IWC Doppelchronograph.

What Is A Split-Seconds Chronograph?

A split-seconds chronograph is a bend on the chronograph, which is itself a complex system. However, while a typical chronograph can time a solitary occasion, the split-seconds chronograph permits an individual to time various occasions – or parts thereof, like laps – immediately. In the age of the iPhone and the computerized chronograph watch, this is a lovely basic and direct undertaking. In any case, before the innovative advances that brought forward such gadgets, it was definitely not.

Known differently as the twofold chronograph, the rattrapante, and the doppelchronograph, the instrument was first presented in an early structure in 1831 by Joseph-Thaddeus Winnerl, who might build up a split-seconds system with heart piece cam in 1838. By 1923, Patek Philippe had made one that could find a way into a wristwatch. Right up ’til today, Patek actually makes the littlest rattrapante chronograph on the planet as the ref. 5959.

The Patek Philippe ref. 5959, an illustration of a more ordinary split-seconds chronograph

The split-seconds chronograph functions on the base of an ordinary chronograph, ordinarily one with a segment wheel. Taking a gander at the dial, there is an additional chronograph seconds hand that can be made to stop autonomously of the primary chronograph seconds hand, and afterward be made to “get up to speed”  to the principle chronograph seconds hand, typically by means of a committed additional pusher. This is completely made conceivable by a sensitive mechanism that comprises of an additional wheel set straightforwardly over the focal chronograph wheel. This additional wheel – the split-seconds wheel – sits between two pliers. Rough surfaces outwardly of the split seconds haggle within the pliers permit snappy and solid collaboration between the surfaces through rubbing. (Envision culling a quarter by its ribbed sides with a couple of tweezers.) 

A split-seconds chronograph development with pliers ready to get and stop the split-seconds wheel in the center.

The two wheels are associated with each other, and turn the equivalent forward way when the chronograph is enacted. They stop together when the chronograph is halted, and resetting the chronograph makes the two wheels reset together too. The two wheels will possibly move autonomously when the split-seconds pusher is actuated, which causes a the arrangement of pliers to snatch the split-seconds haggle it while the principle chronograph keeps on turning. An instrument comprising of a heart cam and roller goes about as a sort of “memory” for the split-seconds wheel, permitting it to immediately get up to speed to the focal chronograph wheel with the push of a button.

The IWC Double Chronograph

Like so numerous other IWC high-complications, the virtuoso of the IWC Doppel was its utilization of a promptly accessible – some may say rather common – base development as the establishment for one of watchmaking’s most difficult systems. The Valjoux 7750 was planned from the start to be not difficult to machine and gather with parts that were pretty much compatible. Habring’s development took this way of thinking and it stretched out it to the rattrapante work too. IWC’s part seconds was the first to utilize a cam framework for both the chronograph and for the rattrapante. Furthermore, on the grounds that the Habring-planned module utilizes this impenetrable workhorse of a development, it is additionally perhaps the most sturdy and stun safe split-seconds cash can buy. We’ll get to that shortly, yet all things considered, over 25 years after the first were made, IWC’s Caliber 79230 has demonstrated amazingly resilient.

IWC has iterated on this complication a couple of times, packaging it in clay, gold, and even platinum. Furthermore, it’s seen life across various lines as well, including the Portuguese and the Ingenieur. However, the model that we have here is the first tempered steel Pilot Double Chronograph ref. 3711, which turned out in the mid 1992. It’s a somewhat huge 42mm x 17mm flieger style watch, with a delicate iron inward case incorporated into the treated steel external case to shield the development from magnetic fields. 

The IWC Double Chronograph was generally conceivable basically in light of the time in which it was formulated and fabricated – the mid 1990s. During this time, the imperative parts could dependably be machined by CNC. It was likewise the first completely industrialized or “mass created” split-seconds chronograph. While in the past such systems must be meticulously sorted out and changed by hand to fine resiliences, the IWC variant was hearty and could be worked with the guide of machines. Furthermore, that is not all – while you could kill a customary split-seconds chronograph by pressing the catches faulty, you could practically hand the IWC Double Chronograph over to exhausted six-year-old and let them begin driving away without compromising the caliber.

The ordinary beginning/pause and reset catches flank the crown.

An additional catch is found on the opposite side of the case for the split function.

One of the chief difficulties Habring experienced in “retrofitting” a split-seconds module onto the Valjoux 7750 development was getting two focal axles through the whole development rather than one. Habring says that the first 7750 chronograph place wheel hub just has a width of 0.5mm, yet he needed to utilize this space for the cylinder and the pivot. Subsequent to falling flat to bore openings into such flimsy steel, he called an old manager of his by the name of Kurt Kerber, who suggested purchasing meager empty hypodermic needles from a clinical inventory store to fabricate the models. Lo and view, it worked.

Early IWC Double Chronograph development model (Photo: Courtesy Richard Habring)

Pilot Progenitor

The unique Double Chronograph is additionally a vital watch from a plan outlook, as it proceeded to give the plan language of the standard IWC Fliegerchronograph, and actually the total of IWC’s cutting edge pilot’s watch range. Obviously, its overall plan, including the hands, dial markers, and Arabic numerals, are taken from a lot more established and similarly acclaimed watch: the Mark XI, which IWC started delivering in 1948. 

The IWC Mark XI.

While there have been various executions of this twofold chronograph development inside the pilot’s reach, there is something  special about the ref. 3711, with its domed sapphire precious stone and its tritium dials, large numbers of which have stained magnificently in the mediating decades.

In the Pilot line alone, IWC has gotten a considerable amount of mileage out of Habring’s part seconds system. To begin with, there was the ref. 3711 that you see here in this story. It turned out in 1992 and was supplanted by the very much like ref. 3713, with the chief contrasts being the change from a domed to a level sapphire precious stone and the substitution of tritium hands and markers with SuperLuminova. These pieces laid the foundation for the mainstream 46mm Top Gun form, the ref. 3799, just as different models in the Spitfire range, notwithstanding variants in the Ingenieur line. Another IWC family with bunches of split seconds contributions was the Portuguese. In 1994, Richard Habring started contemplating a slimmer adaptation of his split-seconds, and the plan to make a physically twisted rendition that shunned the day/date and hour counter was considered. Habring says that he had the option to persuade Blümlein to support the vertical bi-compax format for the Portuguese Rattrapante when he showed the IWC supervisor an image of an early Patek Philippe split-seconds chronograph with such geometry.

For insofar as I’ve known IWC, the split seconds chronograph has been a piece of at least one of the company’s primary product offerings, yet a new examination of the IWC site uncovered nary a split seconds chronograph in the current assortment. This stunned me. IWC’s patent terminated in 2012, which has permitted different watchmakers, including Habring himself, to make this sort of worked on split-seconds by and by. I’ve contacted IWC for explanation as to if and when we may see another split-seconds chronograph in its arrangement, or on the off chance that they have decided to zero in on different kinds of looks for the time being.


The unique ref. 3711 remaining parts truly receptive as far as cost, and can infrequently be found for around $5,000 on the web. Not awful at all for perhaps the main watches made by IWC in the cutting edge period. As far as competition from different brands, the first IWC Double Chronograph ref. 3711 didn’t actually have any at its delivery in 1992. At the point when it came out, it was the main ever twofold chronograph that pre-owned cams for both the brief instant and for the chronograph. Habring’s plan made an instrument watch – made an IWC – out of one of watchmaking’s most finicky complications.

Next week, we’ll be taking an inside and out glance at the Valjoux 7750, and how Habring & Co. handled incorporating a rattrapante into the development. Stay tuned. – Ed.