iwc 7750 modifications | Smoke and Mirrors iwc 7750 modifications Changing the date on a correctly serviced swiss 7750 or a7750 between 6 & 9 is actually OK - there is a slipping mechanism in place to prevent damage - however forcing it . $8,845.00
0 · What IWC do to their 7750
1 · User guide to the A7750 movement.
2 · Up Close: IWC Portugieser Chronograph 3716
3 · The Iconic Valjoux 7750 Chronograph Movement: Everything You
4 · The Breitling Watch Blog » The Ubiquitous Valjoux 7750 Movement
5 · Smoke and Mirrors
6 · Question re: 7750 Levels Of Quality
7 · IWC Modified Movements Explained
8 · From ETA
9 · Everything You Should Know about the Legendary Valjoux 7750
$9,650.00
One of the IWC modifications on the 7750 (back in the nineties) was the introduction of a weaker mainspring, to achieve a lower wear and tear of the turning parts, thus resulting in . There are some many changes and modifications to the calibre 7750 leading to far lower power requirements of the movement. As a result the original ETA barrel is now far too . From an article in WatchTime dating to December of 2002 comes information that IWC does similar upgrades to the 2892-A2 as they do to the 7750 to abate friction, tighten . An IWC Da Vinci Perpetual Calendar Chronograph (calibre 79261) based on the 7750 modified by Kurt Klaus – image by Zeitauktion. An IWC Doppelchronograph 3711 with .
Changing the date on a correctly serviced swiss 7750 or a7750 between 6 & 9 is actually OK - there is a slipping mechanism in place to prevent damage - however forcing it . With a highly modified Valjoux 7750 movement called the Calibre 79350, it is probably the highest quality movement of this lot, but without the COSC Certification. IWC .
The 7750 uses a coulisse-lever escapement, meaning that the stopwatch functions are driven by levers that push an oblong cam back and forth, alternately starting, stopping and ..95.00.00
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What IWC do to their 7750
User guide to the A7750 movement.
Both calibres were based on the ETA Valjoux 7750, modified to have a continuous seconds at six o’clock and the omission of the hour totaliser at nine o’clock. In addition to .
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Currently ETA modifies the 7750 to increase accuracy and stability, and increase the power reserve. They do this for Hamilton and I think Tissot. But as far as I know these . There are some many changes and modifications to the calibre 7750 leading to far lower power requirements of the movement. As a result the original ETA barrel is now far too . IWC Portugese MSRP: 00 (up to ,000 or so in gold) Online: 00 approx. This is one of the more expensive watches out there with the Valjoux 7750 based movement, especially in gold. With a highly modified Valjoux 7750 movement called the Calibre 79350, it is probably the highest quality movement of this lot, but without the COSC . Both calibres were based on the ETA Valjoux 7750, modified to have a continuous seconds at six o’clock and the omission of the hour totaliser at nine o’clock. In addition to these modifications, the IWC version of the 7750 was upgraded in several ways, including with a higher jewel count and more decorative finishing.
The pinnacle of all these tuning efforts lies in completely replacing the barrel. There are some many changes and modifications to the calibre 7750 leading to far lower power requirements of the movement. As a result the original ETA barrel is now far too strong for the modified IWC movement. A "weaker" IWC barrel brings about significant .
First up, the Valjoux 7750. It's the most common automatic chronograph on the market by a wide margin. Longines calls it the caliber L644, L674, or L678. . I read that IWC were doing a lot of modifications on the VJ7750 Ébauche to make the pushers smoother, better winding mechanism, smoother chrono second sweep. and that so much was done . The pinnacle of all these tuning efforts lies in completely replacing the barrel. There are some many changes and modifications to the calibre 7750 leading to far lower power requirements of the movement. As a result the original ETA barrel is now far too strong for the modified IWC movement. A "weaker" IWC barrel brings about significant . Since its debut in 1998, the IWC Portugieser Chronograph Ref. 3714 has become the most sought-after, the most recognisable, and certainly the best-selling model in the Portugieser family. Apart from being a veritable design success, this watch has acquired cult status for one reason: it hasn't changed a bit since its inception. To celebrate the 20th . I did some searching on the web as to a more detailed description regarding the modifications IWC does to ETA watches. . For example, what changes are made to an ETA-Valjoux 7750 calibre before it is built into an IWC chronograph Many watch manufacturers purchase their calibres from the serial base calibre manufacturer ETA. ETA offers a wide .
Earlier ETA used to supply IWC with unassembled 7750 kits that IWC used to extensively work upon to improve an already proven workhorse. Since the first decade of the millennium, ETA has stopped supplying movement kits such as the 7750, they have been delivering completely assembled movements to non-Swatch group companies.This example of an IWC caliber 79350 is from an IWC Portuguese 3714-47 automatic chronograph. This caliber is based on the ETA caliber 7750. IWC uses the chronometer grade with 31 jewels and assembles/finishes/tests them at the IWC factory. Please share your experiences and thoughts about the IWC caliber 79350 in the comments section below.
At the beginning of last year, IWC introduced a 150-year anniversary edition of its Portugieser Chronograph as a limited-edition model alongside the original Portugieser Chronograph, which debuted in 1998. The most significant difference between the two is the movement: the unlimited version has a modified ETA Valjoux 7750, while the anniversary .IWC caliber 7922 is a Swiss made automatic chronograph watch movement with 25 jewels. The base movement is an ETA/Valjoux 7750.It is adjusted to five positions.. Isn’t it just a 7750? Many brands use the ETA caliber 7750 to power their automatic chronograph models, but it appears that IWC has gone to great lengths to communicate what they feel separates their use of base .
This second generation of the 7750 would be officially named the ETA/Valjoux 7750, although that was sometimes simply abbreviated to the ETA 7750. This new production would quickly become popular among other watchmakers, as well. Watchmaker IWC also admired the 7750, and set about creating a watch that could take advantage of its features.The Valjoux 7750 is a workhorse chronograph movement, and they are pretty reasonable to service for a mechanical chronograph, and most decent watchmakers will know how to work on them. . Don’t make excuses for it, the Valjoux 7750 is an excellent movement, even without the IWC modifications. Its ubiquity takes nothing away from how great it is. IWC also quickly took a liking to the 7750, and it was technical director Kurt Klaus who used it as a base for what would become the legendary Da Vinci perpetual calendar chronograph. . The Chevy motor is the default choice for racers worldwide for modifications at all levels of competition. It started in has powered the 1955 Bel Air to a . One of the IWC modifications on the 7750 (back in the nineties) was the introduction of a weaker mainspring, to achieve a lower wear and tear of the turning parts, thus resulting in longer life-span of the movement and less frequent servicing.
There are some many changes and modifications to the calibre 7750 leading to far lower power requirements of the movement. As a result the original ETA barrel is now far too strong for the modified IWC movement. A "weaker" . From an article in WatchTime dating to December of 2002 comes information that IWC does similar upgrades to the 2892-A2 as they do to the 7750 to abate friction, tighten tolerances, and increase efficiency. An IWC Da Vinci Perpetual Calendar Chronograph (calibre 79261) based on the 7750 modified by Kurt Klaus – image by Zeitauktion. An IWC Doppelchronograph 3711 with modified Valjoux 7750 with split-seconds function, thanks to Richard Habring Changing the date on a correctly serviced swiss 7750 or a7750 between 6 & 9 is actually OK - there is a slipping mechanism in place to prevent damage - however forcing it WILL result in a large amount of damage.
With a highly modified Valjoux 7750 movement called the Calibre 79350, it is probably the highest quality movement of this lot, but without the COSC Certification. IWC rarely certifies their watches. So that is a brief roundup of some of the watches available in the range with the Valjoux 7750 base movement. The 7750 uses a coulisse-lever escapement, meaning that the stopwatch functions are driven by levers that push an oblong cam back and forth, alternately starting, stopping and resetting the chronograph. Both calibres were based on the ETA Valjoux 7750, modified to have a continuous seconds at six o’clock and the omission of the hour totaliser at nine o’clock. In addition to these modifications, the IWC version of the 7750 was upgraded in several ways, including with a higher jewel count and more decorative finishing.
Up Close: IWC Portugieser Chronograph 3716
Currently ETA modifies the 7750 to increase accuracy and stability, and increase the power reserve. They do this for Hamilton and I think Tissot. But as far as I know these improvements are on the Elaboré grade, not Top or Chronometre. What other brands have "improved" the 7750 significantly? And I'm asking specifically about the movement.
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These 5514 are highly desirable to collectors. The moniker ‘Sea-Dweller’ began as a nickname, owing to the amount of time that the watch spent underwater, over time it stuck, and Rolex continued with it as the official title. The Sea-Dweller 1665 edition 1, aka the Double Red Sea-Dweller.
iwc 7750 modifications|Smoke and Mirrors
