Pre-Baselworld 2015: Arnold & Son Constant Force Tourbillon Watch – A Symmetry Of Beauty With Dead-Beat Seconds Japanese Movement Replica

By Meor Amri Meor Ayob

What else can you do, mechanically of course, in the space available for a typical modern wristwatch that would still impress watch connoisseurs? It seems that Arnold & Son have done just that with their latest creation, the Constant Force Tourbillon with Dead-Beat Seconds watch. Only 28 of this watch will be produced.


A major problem of any mechanical clock is the non-linear weakening of the mainspring’s power as it releases energy. Trying to measure time at an extremely steady rate despite the power volatility of the mainspring has been a bane for watchmakers for centuries. Maintaining a ‘constant force’ from the mainspring has been a holy grail for watch makers. Arnold & Son is able to do it by generate this constant force of energy via to two mainspring barrels located at 10 o’clock and 2 o’clock. The first mainspring powers the gear train while the second mainspring compensates for the first mainspring’s loss of torque via a newly patented constant force regulator.


Arnold & Son’s newly patented constant force regulator.

As is normally the case with constant force mechanisms, power from the mainspring first flows through the regulator before reaching the escapement. However, where the Arnold & Son’s mechanism differs from that of others is that this mechanism drives the running seconds in a jumping fashion. The sub-dial at 7 o’clock ticks while the tourbillon at 5 o’clock sweeps on its axis. Meanwhile, the tourbillion averages out gravitational errors by constantly rotating the escapement through 360 degrees of motion. These three complications, constant force, tourbillon and dead-beat seconds in this watch is why Arnold & Son is considered one of the best high-end watch brand manufacturers.


The watch is rather large at 46 mm wide. Made from 18-carat red-gold, the case houses Arnold & Son’s in-house Calibre A&S5119. This 39-jewel, hand-wound mechanical movement has a 90 hour power reserve. The dial is made out of anthracite and totally transparent, allowing the mechanism to be viewed from multiple angles. Protecting the dial is sapphire with anti-reflective coating on both sides. The rear of the watch is also made out of sapphire crystal.

This watch has a water rating of 3 bars or 30 meters. To complete the style, this timepiece is fitted with a hand-stitched brown alligator strap.


Though the contemporary Arnold & Son is currently owned by the Citizen Group and has been revived in La Chaux-de-Fonds, Switzerland, the legacy of precision timekeeping, advancements in escapement engineering, and Breguet’s influence can still be felt with this timepiece. The Arnold & Son DBG Skeleton basically combines two motions, each using their particular barrel, gear train, escapement, and balance, united with one winding system and a single centralized second hand. The two dials for home time and GMT are powered with their own dedicated movements, allowing each to be placed independently via a dual crown system at 3 and 9 o’clock. Coolness factor apart, this also has a practical advantage in having the ability to set GMT time to the minute, which is very beneficial when dealing with time zones cancel by half an hour such as portions of India, Australia, and Canada.In contrast to the non-skeletonized variant of this Arnold & Son DBG we reviewed previously, this incarnation supposes some legibility in order to better show that beautifully symmetrical movement. A ring of smoked sapphire crystal is employed for every dial to help bring the numerals more into focus against the busy backdrop without completely obscuring it, which is a clever move. GMT time can also be differentiated via the dial’s use of skeletonized hands and Roman numerals, versus the Arabic numerals and solid hands featured on the home time dial. Unlike the last edition, the palms on the Arnold & Son DBG Skeleton are gilded rather than blued, which can be visually a nice complement to the vulnerable balance wheels but also makes them difficult to view at a glance.

My personal preference when it comes to style is symmetry. This watch has it. The placement of the main springs and the two sub-dials sits perfectly balanced to one another. Despite the transparent nature of the dial, the bulk of the gears are not visible. Only the mechanisms that matters most i.e. the tourbillon and the dead-beat seconds can be seen. Without a doubt, this watch is a brilliant and beautiful design.

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Technical Specifications

Calibre: A&S5119
Exclusive Arnold & Son mechanical movement, hand-wound, 39 jewels, diameter 36.8 mm, thickness 6 mm, power reserve 90 h, double barrel, 21,600 vibrations/h
Functions: hours, minutes, true beat seconds, tourbillon, constant force
Movement decoration: nickel-silver and steel movement, palladium treated bridges and NAC grey treated main plate with Haute Horlogerie finishing: hand-chamfered bridges with polished edges and brushed surfaces, screwed gold chatons, screws with bevelled and mirror-polished heads
Tourbillon cage: mirror-polished with hand-chamfered polished edges and circular satin-finished surfaces
Dial: anthracite open dial
Case: 18-carat red gold, diameter 46 mm, cambered sapphire with anti-reflective coating on both sides, see-through sapphire case back, water-resistant to 30 m
Strap: hand-stitched brown bottier alligator leather with patina
Limited edition: 28 timepieces
Reference: 1FCAR.B01A.C112C


Meor Amri Meor Ayob – Contributing Editor

Meor Amri is a passionate watch collector from Kuala Lumpur, Malaysia. Having bitten by the horology bug in 2010, he has written extensively about the watch scene and has assembled a large collection of watches (excessively!!) on his own free time. His blogs on the same subject are: Eastern Watch & Western Watch Read his articles here.

A Fortnight Review: 2 Weeks On The Wrist With The Graham Chronofighter Vintage GMT Watch Replica Clearance

By Ben Newport-Foster

Graham 1695 is a Swiss brand with historic English heritage. The name comes from George Graham, a renowned English watchmaker from the 17th Century and the year comes from when Graham joined the Guild of Clockmakers in London. Graham died centuries ago but his name was reborn in the 1990s when Eric Loth bought the rights to the names of English watchmakers and launched Graham 1695 and Arnold & Son. Arnold & Son focuses on haute horology whilst Graham makes modern sports and pilots style watches with a unique twist.

The Chronofighter range dominates Graham’s line-up and mostly consists of pilots/racing watches. In my opinion, there is nothing designed today that looks like the Chronofighter. I’ve seen left-handed watches and left-handed chronographs, but I’ve never seen a left-handed chronograph with a trigger activation. The layout is disconcerting when you first wear the watch, especially for me being a left handed who has forced himself to get used to right-handed watches. The trigger/crown guard adds several millimeters to the left hand side of the watch so my initial thoughts were that it would be quite ungainly on the wrist. Yet after a few days of wearing the Chronofighter, I was happily squeezing the trigger at every opportunity and hardly noticed the extra metal.

The layout of the Chronofighter chronograph is the inverse of a regular right-handed chronograph; the bottom pusher/trigger starts and stops the chronograph, with the top pusher resetting it. The trigger emphasizes this change in layout wonderfully and it felt very natural and comfortable to use the chronograph this way. As the trigger is so different in design from a standard pusher chronograph, I can understand why no-one uses it, but from a ergonomic perspective, it’s marvelous achievement. It is worth noting that as I’m a lefty wearing it on my right wrist, I don’t know how it would feel on the left wrist. As someone who has had to contort their wrist into weird shapes to activate a standard chronograph (whilst still being able to see the dial), the layout of the Graham was much appreciated.

The one major downside to the crown guard/trigger design is that changing the crown positions can be a little tricky. The trigger and guard sit in the usual place where I would look to place my fingers and the bezel overlaps the case by a millimeter or so. Because of these decision choices, getting the tip of my finger behind the crown to set the hands was a struggle at times. The crown itself is large and has deep knurls, so once it has been pulled into position, winding and setting the time felt good.

The case measures in at 44mm, will probably be available in rose gold, and is water-resistant up to 30m. The dial is completely skeletonized with double accounts set against C?tes de Genève stripes, giving a wonderful contrast and extra symmetry. The time zone signs, as with previous versions, differ with Arabic and Roman numerals against an increasingly popular smoked background. I believe these include an eclectic touch to virtually equal parts of this watch. Since the movement does feature separate time zone elements, each time zone is managed by its crown, or “ears” as many enthusiasts refer to them, at 3 and 9 o’clock. Every time zone is placed using its personal crown, while the watch is wound solely by the crown at 3 o’clock. Overall, the aesthetic refinements into the dial and the symmetry of the Arnold & Son DBG Skeleton watch will refresh and breathe new life to the Arnold & Son DBG. It manages to exhibit the intricate and striking details of a very complex timepiece without delving into the “too busy” category that many are inclined to fall into when handling such a complex endeavor. While I can definitely find a white gold or platinum alternative later on, I feel this is a welcome addition to the collection, and one I would be excited to wear. The Arnold & Son DBG Skeleton Ref. 1DGAP. S10A.C120P will probably be limited to 30 pieces and will carry a price of $38,850 that is actually a couple million dollars less than what the initial DBG see in gold cost.

The GMT hand is large and obvious, two of the most important traits of that complication, and it pairs well with the black ceramic unidirectional bezel. The 24 click bezel is well designed and stands high up from the case so is easy to grip and turn. I really liked the slanted grooves that ran along its perimeter as whilst they add no functionality, they just look good. Sometimes looking good is enough. Like when setting the time on the hour and minute hands, the GMT hand is a little trick to set due to the overlapping bezel, but apart from that I had no problems with it during my time with the watch.

At 44mm, the Chronofighter is large.

The trigger adds another 8 millimeters to the left hand side and the thick bezel makes it sit very tall on the wrist, yet despite the heft, it wears smaller than you would expect. The short lugs ‘shrink’ the case to have a more manageable wrist presence, but don’t expect this to fit under a tight shirt cuff.

At 12 o’clock is a day/night index for both GMT time and home time, using matching skeletonized and stuffed palms to tell them apart. The bottom half of this index is darkened, which assists the visual representation of this “night” part of the disc. I do wish the Arnold & Son emblem was located elsewhere though, as its position interrupting the moments monitor at 12 o’clock can make precise time-setting difficult. Another niggling difficulty I found was that the second hand counterweight closely emulates the appearance of the home time palms, which can occasionally cause a moment of confusion once you glance down and watch three hands pointing at the dial. In an ideal world, I’d have loved to observe that the moment hands on each dial stretched only a bit further to properly reach the minute trail, along with the hour palms shortened a tad to not overlap the hour mark, but that is a minor aesthetic qualm which doesn’t affect utility.On the opposite side of this Arnold & Son DBG Skeleton, the base plate of the manufacture bore A&S1309 is shown. The motion is made from nickel silver (also known as German silver or Maillechort, an alloy of aluminum, nickel and zinc) which has been rhodium-plated and embellished with C?tes de Genève. The wheels are satin-finished and provide a contrasting three dimensional texture to the base plate, and involving the chamfered edges of these bridges, the gold gear train can be seen. The movement is hand wound obviously, which contributes to its thinness in a mere 3.9mm. It includes 42 stones and provides a 40 hour power reserve while the twin accounts oscillate at 21,600vph, or 3Hz. This is undoubtedly a highly elegant movement, but compared to the depth of detail given by the skeletonized dial, the opposite side of this movement almost feels like a letdown.

Whilst this is called the Chronofighter ‘Vintage’ GMT, it is not a ‘heritage’ watch like the Tudor Black Bay or the new Omega Seamaster 300. The vintage elements present (the cathedral hands and the double date window) are overshadowed by the contemporary case size and modern feel of the watch. It looks more vintage than some of the other Chronofighters, which experiment more with hour marker design, but the Vintage GMT is a modern watch, through and through. I would be really interested to see what a ‘true’ heritage watch from Graham would look like, even though they have no watches from earlier in the 20th Century.

Inside the watch is the Graham Caliber G1733, a modified ETA Valjoux 7750 with added GMT module and customized rotor. It has an 40 hour power reserve and beats at 28,800bph. The 7750 is a real workhorse of a movement and it was reliable during my time with the watch, although I would have preferred to see a column wheel chronograph movement over a CAM. The ease in which the chronograph can be activated with the trigger is high and I imagine it would have been perfect when combined with the feather-light touch required to start a column wheel. The movement is decorated with the traditional Geneva stripes on the rotor, along with a perlage finish on the base with a few blued screws thrown in there for good measure. I have seen more impressive decoration on watches in this price range but decoration is never the be-all or end-all of a watch.

After two weeks with the Graham, I really was enamored with the unique design and functionality. There were times when the size was a bit large for my particular mood and I was constantly worried about scratching the gigantic, over-sized buckle, but by the time I sent it back, I wanted more time with it. It may not be perfect, but the Graham Chronofighter Vintage GMT offers a unique chronograph design that you can’t find anywhere else.

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