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> REVIEW: Portuguese auto/chrono ...
REVIEW: Portuguese auto/chrono R3714
700 Discussions and Comments
This review is based on my first hand experience servicing this model at our authorized IWC repair facility.
First some basic information about IWC’s model 3714:
- Three part case held with screws, upper bezel, middle case, case back
- Rose gold, white gold, stainless steel, diameter 40.9 mm, height 12.45 mm
- Curved sapphire crystal, water resistant to 3 atm (30 meters/100 feet)
- stitched croco deluxe (high quality)
- steel deployment buckle with IWC logo on cover, well made -- closes and opens with a solid snap
- Silver-plated, black (with white 2 sub dials) or ALL white, embossed Arabic numerals
- Upper case bezel has a track under the crystal indicating minute and 1/4 second divisions
- Two sub dials, upper = minute rec`order` counter, lower = small seconds hand
- Dauphine style
- small secons (with stop hack)
- chrono minute rec`order`
- chrono sweep seconds rec`order`
Movement (IWC calibre C79240)
- mechanical self winding
- 28, 800 bph
- 31 jewels
- 44 hour power reserve
- Nivarox spring
- Glucydur balance
- regulator with micro-precision screw
Remarks & Opinions
The movement, based on a Valjoux 7750, is decorated in familiar IWC style, is gilded, perlaged and assembled with polished blue screws. What sets this (C79240) movement apart from all other basic 7750 chronographs is that it comes with neither the day or date calendar and does not have an hour rec`order`. Thus the dial only has TWO sub dials, one on the top at the 12 o’clock, indicating a minute rec`order`, and the lower sub dial at the 6 o’clock having a small seconds hand (which can be stopped by pulling the crown outward.
In `order` to equip this movement with a small seconds hand, the technical engineers at IWC had to improvise and develop an add-on module to transform the arrangement of having a small seconds hand at the bottom at the six rather than at the 9 o’clock position. In place of where the hour rec`order` is normally fixed to the movement at the 6 o’clock side, IWC cut out the base plate and added an in-house made train bridge platform, sandwich style, containing three wheels with a tension spring which engages with one of the regular train wheels. It is a reduction system which further transmits the power from the mainspring to the normal train wheels and finally to the small second hand. This is a unique IWC innovation to the otherwise regular 7750 movement configuration.
In addition, with no calendar system plate which normally would hold down some setting parts, the engineers added a full plate cover with screws to keep those parts in their place.
The upper bezel is inconspicuously held tight to the middle case with four long screws underneath the case back which in turn is held by four screws placed within flat recessed grooves. I have seen this method also used by JLC, IWC’s sister company, on some of their models.
Although none of what I described should be seen as a challenge to a company which has demonstrated far more exceptional capabilities with their Grand Complication and the Destriero, nevertheless it is a reminder that IWC is constantly doing their own research and development, as well as technical refinements large and small. Many of their different calibre movements undergo several revisions before the master technicians are fully satisfied with the quality.
As a watchmaker having worked on many high grade brands over the years, I look at the top watch manufacturers with a broader understanding of their expectations of delivering quality products. I don’t focus on any single movement with scrutiny under a microscope as I’m all too aware that one will see endless imperfections and visual sights (on all high luxury brands) that might be disturbing. Instead, I look at the overall construction of a watch and movement considering a complete evaluation of aesthetics and performance in conjunction with what the manufacturer stands for.
I also take into consideration the REAL HISTORY of the company, their COMPLETE PRODUCT LINE and the SERVICE SUPPORT they offer for their brand. This changes the overall picture when judging any given timepiece because the results are totally different than when just concentrating on one critical examination. As a result, one bad apple (if any) will not, in my opinion, change my overall impressions of a recognized watch brand.
I believe that IWC, with a real history of over 125 continuous years, has perfectly demonstrated their superb capabilities in bringing a wide range of innovative and technical improvements each year at acceptable prices as they keep introducing new style timepieces.
(c) Jack Freedman, 2000/2001
700 Discussions and Comments
The shown diagram illustrates the main plate cutout and special parts manufactured for this model watch.
Courtesy of IWC Watch Company - Schaffhausen
8 Discussions and Comments
Would love to see photo of movement
Thanks for the review. I would love to see a photo of the movement of the 3714 if anyone has one available.