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  1. #1
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    Default TEST: IWC 3707 GST Chronograph Automatic Ti Replica



    I first fell in love with this watch after having seen Pugwash’s pictures of his Franken. The simplicity of the design, the way the white hands strike out of the black dial and of course an understatement that is representative for IWC made me want this watch really bad.

    (Picture courtesy of Pugwash)

    The GST line was introduced by IWC in 1997 to follow the Ocean-line after the end of the famous design-collaboration with Ferdinand A. Porsche.
    Together with Porsche, the IWC built watches like the Ocean 2000 for example,
    a diverwatch used by several military special forces, such as the German Kampfschwimmer (commando frog men).


    This one even has a military stock number:


    But IWC did not fail to create a worthy successor with the 3536 Aquatimer, head of the new sportsline GST. A very professional divertool water resistant up (or down) to 2 kilometers into the deep.


    The designers from Schaffhausen kept the puristic appearance of the Porsche-Design, holding close to the principles of the modern-classic. Marcel Breuer, one of the Bauhaus founders once described the Bauhaus credo: “At the moment we have built every part to function and not to disturbs the other, we’re done”.

    This functionalism even strikes through into the name GST, which simply stands for the used materials: Gold, steel, titanium.
    [youtube]S6YvvoBWpe4[/youtube]

    The slightly smaller brother of the GST Aquatimer is the GST Chronograph Automatic. Its design lead into the current Aquatimers, with a completely round body where only crown and pushers stick out. The lughorns seem to grow out of the case creating a one-piece-construction appearance.

    The GST chrono has also the typical inner bezel, which is not for diving, but a tachymeter scale. Often wrongly described as an Aquatimer, it is not. Only the look was obviously inspired by the Grandfather-Aquatimer, the very first IWC divingwatch.


    It is merely a sportschronograph, but with a waterresistance of 120m you can safely swim and snorkel with it.

    In my own biased opinion, the titanium versions of the GST line are the most beautiful. While the dials on the steel and gold pieces are white with blingy golden indexes, the titanium watches are equipped with a silk-matt finished black dial with bright white indexes and font.
    Also the steel cases have a polished finish which takes a lot of the sporty character. A statement that feels like “I want to wear a sportswatch, but actually I am too rich to use it".
    I apologize to all two-tone submariner fans out there.

    Genuine Technical Data:
    Reference: 370701
    Caliber: ETA Valjoux 7750
    Movement: Selfwinding mechanical
    Powerreserve: min. 42h
    Vibration: 28.800bph
    Jewel: 25 jewels
    Calendar: Day and Date
    Case: Titanium Grade 2 (5% Legierung)
    Water resistance: 120m
    Crown: Screw in
    Caseback: Screwed in
    Crystal: cambered sapphire
    Diameter: 39.7mm
    Thickness: 13.9mm
    Lugsize: 20mm
    Weight: 135grams





    The replica’s case has the same dimensions as the genuine item and is constructed out of three parts: bezel, body and caseback. The whole watch is made of titanium, including the bracelet system. Usually titanium is a material which is as strong as stainless steel, but 45% lighter and softer. Therefore you have to accept scratches very short after wearing. IWC solved this issue by having every ti case hardened by nitrogenium that is blasted against the surface with high pressure, compact it to grade 2 titanium (material grade number 3.7035), the same grade of titanium that is used for engineering high-tech machines and grounds.

    I have no idea what the replica manufacturers do to the rep material, but it does not scratch either. Compared to the old titane Avenger reps, the GST chrono is really scratch-resistant and feels way harder.
    Another advantage of titanium is that it’s very resistant against saltwater, but it ages by time. This means it gets darker. This happens to our reps as well as to the genuines.

    The 1,5mm thick caseback is of a screw-in type and sealed by a gasket that sits in the body. It has the correct markings “Inernational Watch Co. Schaffhausen” and a laser edged serial number.
    Inside the caseback you can find the IWC logo, the “INTERNATIONAL WATCH Co. SWISS TITANIUM” text and the same serial number as on the outside and the reference: 3707.

    The bezel is connected with the body very tight; there is no gap between the two parts. It is larger in diameter allowing the crystal to be almost the same size as the case-body. Like the slightly higher sitting crystal it is a little cambered. Even though this looks nice, there is a higher danger of breaking the crystal because it is not protected by the bezel.


    The entire case is what I call a real highlight in both, gen and rep watch history. It is build in a high grade of quality with little tolerances. I think this is a result of IWC’s long time experience in in-house case construction and the rep makers long time experience in copying it. Nothing is sharp or undefined, even the engraving on the caseback feels smooth.

    The crown sits on the tube like on a thrown. It is of a screw-lock type, but you won’t see a thread as it is hidden inside the tube. This is intentional.


    As always, it is not as defined as the genuine counterpart, but still better than on every out of the box rep submariner I have seen so far. It is marked with the fish symbol that vanished together with the GST line. It means the watch is water resistant.


    IWC guarantees a water resistance up to 12 bar (120m) on the genuine, my watchmaker’s Bergeon pressure-tester does the same for 50m on my rep. Maybe I will ask him to take it to a 100m+ tester along with the Oris I tested here.


    Remember that the pushers are not screw locked, so do not push them in the water. Neither on gen or rep.
    The movement behind the caseback is in this case an unfinished ETA Valjoux 7750 which means it is still in the same condition as it left the ETA production facilities in Grenchen, Switzerland. It runs now unserviced for more than 5 years, as the preowner bought it used, too and did not service it neither. Just a guess though. Therefore it runs like a charm and I will have it serviced as soon as my other projects allow spending a buck on it.



    Right now it shows an average accuracy of -44secs with an amplitude-difference of 73°. I don’t worry about the 44 seconds per day, but the strong variation of the amplitude in the last two positions show us that it will need a service in the next year.

    Anyway, this is the same movement that ticks inside the genuine, even though the gen is a little more decorated.

    Once you turn the movement around, you can see the what is in this case a pristine and genuine tritium dial. The replica dial is not bad either, but the font is not as bright and as clear as the real deal and the “SCHAFFHAUSEN” is too large. Also, my friend ryaku (as well as others) noticed the rep dial to be too glossy. A flaw that can often found on replicas (especially when it comes to IWC).


    I can only repeat that I have never owned a more contrasted dial in my collection. The white pops out of the black a lot more than rhodined metal or white gold.
    The genuine tritium which most watch manufacturers discontinued to put on watch dials or hands looses it’s luminosity after some years, so I am glad that mine still glows a little in the dark. It is going to change colour when time passes so it can age happily together with the titanium on my wrist.
    The day and date wheel are correct as IWC still uses ETA discs in the GST line. They align perfectly in the window.


    The dial is below a cambered sapphire that comes without any AR, just like the gen. I for myself felt it is a pity to hide this wonderful dial behind glares, so I asked my friend Jakub to coat it with his famous state of the art AR. The result is... well, judge for yourself.



    The hands are still of the rep (at least that’s what I think). They are of correct size and all white with the hour hand being a lot shorter than the minute hand, so you won’t have a problem to distinguish them from each other. As they should be lumed with tritium as well, it is okay that they do not glow at all – I can live with that. But it makes it impossible to tell the time at night. The second hand is bent at the end, pointing close on the rehaut, which is good.

    The tachymeter scale around the dial is another spot on part of this watch. It has clear, bright font matching the gen dial much better than the “original” rep one. It states the correct “T SWISS MADE T” at six.

    The real highlight, however, is the bracelet. It seems to stick out of the round watch case. It was introduced with the GST line, but is still built into the recent Aquatimers and Ingenieurs.
    On this watch, however, it is really smooth which might be because of its material, titane. It does not feel cold or sharp when you put it on after not having worn it for some hours or days.
    The wearing comfort is excellent, you can wear it loose in spring and summertime and it will stay in place due to its little weight.


    The bracelet does not tug out any hairs on your wrist and even though it has no SPIEL at the links, it remains all flexible. Like on our Ingenieur replica, it is connected with cylindrical bars the can be pushed out when holding down a button on the inner side of the link. Even a dumbass can do this on his own with two toothpicks or ballpens.
    If you ever had to adjust a pin-connected Omega bracelet, you will know what it’s worth. Bauhaus style.

    It is though a fact that not all links are adjustable on the rep, unfortunately. It looks as if the rep makers got tired after pushing the rep this far and went a little lazy here. Still, the “dummy buttons” are on all links, creating at least an image of a correct bracelet. And to be honest, the important links CAN be adjusted. So let’s not get too picky here.

    Still, the clasp lacks of the common flaw: there are holes on the sides that should not be there.
    Beside that it locks and opens flawlessly and even during sport activities will it keep the watch safely on your wrist.
    This IWC has a smart hidden push-button that is located inside next to the "I" of the "IWC" signature on the clasp and this button makes it so easy to open the bracelet.





    IWC discontinued the GST line in 2003, I wonder when the rep factories will do the same.
    Farewell, GST!





    CONCLUSION
    IWC 3707 GST Chronograph Automatic

    Strap and clasp (max. 10points)
    High quality, precise craftsmanship. Some links lack of a functional release button.
    The clasp has holes that should not be there.
    8points

    Operation (5)
    The crown screws in and out like through butter. Operation is smooth and precise.
    5p

    Design (15)
    What can I say, it is stylish. The black white combination together with the titanium… Sweet!
    Still, some might find it too small as the trend goes to rather large chunky watches.
    14p

    Instrument read-out (5)
    Extremely rich in contrast. Bright white hands make the instrument read-out very easy. Luminosity is poor creating problems in the dark, but hey, it’s gen. AR is from K2222.
    4p

    Wearing comfort (10)
    Awesome.
    10p

    Movement (15)
    Same as the genuine. You can’t go wrong with an ETA Valjoux 7750. Gen hands will fit, if you want to upgrade (and if you’re able to source them). Datewheels are same as genuine.
    15p

    Accuracy and reliability (15)
    It needs a service, but other than that it can’t get any better.
    13p

    Workmanship (15)
    I could not imagine on how to make this watch better, rep or gen.
    15p

    Countervalue (10)
    All in all, especially with the ETA 7750, the K2222 AR coating and the genuine dial, this watch is really something special in my collection. It is one of the very rare true titanium replicas.
    10p

    My valuation: 94 %


    Special thanks to AWS, who sold this timepiece to me for a very good price and who was a pleasure to deal with. Great communication, fast shipping and a perfect item description – AWS is really top notch.

    Thank you, too, for your interest. If you liked my little write-up or if you want to criticise something, just leave a small post below.

  2. #2
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    man what an awesome Review SD4K

    Love the IWC line

    Great Read
    "It's never too late to be who you might have been"

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    Nice review. Does anyone know who holds these in Repgeek?

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    Absolutely amazing!

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    Great review!

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    Incredibly wonderful.

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    Who sells the replica?

  8. #8
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    Default

    Just an incredible review. Thoroughly enjoyable read. I built one of these with a Swiss movement and gen dial when the rep first came out a few years ago and had totally forgotten about it. Will definitely dig it up and give it some wrist time this Fall. Thanks again.

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    nice thank you

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    Love the iwc's but far from something i need in my collection.

  11. #11
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    Great review, thanks!

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    Great reviews

    Iwc gst I also bought ,
    But fastener strap is loose

    To find the same strap replica of the replacement difficult !

  13. #13
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    Thank you for nice review.

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