What I'm about to say is a personal observation and is not intended to offend anyone who have other brands of watches in their collection.
Introduction:
This IWC Portuguese Grande Complication Ref. IW377013 in my opinion is very modern in its design and probably the direct competitor of course to the Patek-Philippe Grande Complication Ref. 5074P-001. When compared side by side, the Patek-Philippe looks dated and rather lacking in detail on the dial.
Keep in mind that both watches are measured in 42.2 mm excluding the crown.
Let's Compare the Movement:
However,the Patek Philippe Ref. 5074P-011 uses the Caliber R 27 Q a micro-rotor automatic movement which features Perpetual calendar : day, date, month, leap year by hands Moon phases and am/pm indication. This movement measures in 28 mm in diameter with a height of 6.9 mm 12 bridge 39 Jewels that uses a Gyromax Balance with a rate of 21,600 vibrations per/hr (3 Hz) and contains 467 parts with a power reserve of 48 hours.
Now let's look at the inside of the IWC Ref. IW377013 for a moment:
The IWC Caliber 79091 is an in-house movement with 75 Jewels rated at 28,800 vibrations per hour with a power reserve of 44 hours. This movement encompasses an amazing array of features that includes:
Hour, Minutes, Chronograph, Minute repeater, Perpetual calendar, Four-digit year display, Perpetual moon phase display, Crown-activated rapid calendar advance. In order to make the Caliber 79091 stand out from the competitor,is the fact that this movement contains no more than 659 parts!
The Verdict:
Certainly with the economic state of the Euro-Zone Crisis,the Patek-Philippe Ref.5074P-011 has an astronomical price tag to match the brand. I guess if you are a Patek Philippe Aficionado,then again this watch is worth every penny.
However,those of us who enjoy mechanical innovations,captivating watch designs and a timepiece that is well engineered. The IWC in my view seems to be the logical choice with a down-to-earth price tag.
Conclusion:
The IWC Ref. IW377013 is indeed a Grande Complication,in terms of technical prowess and a beautiful watch to enjoy for many decades.
Simon