O comparatie ETA 7750 cu Omega / Piguet based

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https://omegaforums.net/threads/3313b-m ... ies.13583/

Omega 3313B Movement Worries...

There are really 2 separate sets of issues with these watches. One related to the escapement, and the other related to all watches using this F. Piguet base movement, so this includes 3113, 3200, 3202, 3203, 3205, 3301, 3303, and 3313.

The co-axial models have the issue of the 2 level compared to 3 level co-axial escapement, and in this case the 3 level is more reliable. The 3 level simply eliminates the potential for build of the sticky black residue on the intermediate escape wheel, like this:

Note this is just to illustrate what this looks like, and this was from a 2500C movement.

Of course none of the Swiss lever versions of this movement suffer from this problem, but there is a set of upgrades that were done to these over the years to solve other operational issues. These include things as small as replacing screws so they are less likely to snap, to replacing some levers and parts in the setting area. These upgrades were finalized in 2008, so any watch movement actually made after that should have all these upgrades done.

If not, they are not terribly expensive to do, and if I have a 3301 come in the shop, it usually has some, but not all of the upgrades done, so I typically have to replace a couple of parts.

The movement does have a bit of a bad reputation but IMO that really isn't deserved.

Cheers, Al

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Hello,

Just to clarify, the 3313 and related family of calibers are most certainly not modular chronographs, but fully integrated chronographs. The 3313C is the most recent movement, and in terms of the co-axial escapement there is actually quite a big difference - the C is 3 level where the A and B are 2 level. The implications of that I have described above.

Comparing the decoration on the typical Omega chronometer grade 7750 versions they used in a Speedmaster date type watch, and the 3313C, they are both decorated to about the same level, and both pretty poorly if you get right down to it. A good portion of the plates on both movements are completely unfinished, lack of polished anglage or perlage, etc. As most companies at this level do, they "cheat" like crazy and only finish what can be seen when you look through the sapphire case back or take the solid case back off - even a Rolex 3135 is finished miles better than either of these are.

Both movements use a number of fairly "flimsy" stamped parts (George's big beef with this movement), and clear design compromises were taken on the Piguet under the barrel bridge to keep the movement as thin as it is - I don't have a problem with these personally, but they are often cited as a technical weakness on these movements, even though I have personally never had to replace these parts (and yes some of the same compromises were made on the 8500 and 9300). From a 3313:

If this area is oiled properly during service, then there really is no issue in my view, but it does require a much more generous amount of oil here than what any watchmaker would use typically on a watch, so my feeling is they are often under-lubricated by those not familiar with the watch.

The F. Piguet based movement is certainly different, but I would hesitate to call it unequivocally better. You would have to define "better" in some concrete terms to really get to the heart of any comparison in my opinion. The cam switching and horizontal coupling of the 7750 are considered to be more crude than the column wheel and vertical clutch in the Piguet movement, but personally the love of column wheels is sort of irrational to me from a technical standpoint, so the technical advantage in the systems used comes down to the vertical clutch, compared with the horizontal coupling and the oscillating pinion in the 7750. The vertical clutch has some advantages for sure, but in the Piguet family of movements the main chronograph runner can't be cleaned or serviced, so if it is very dirty or fails it must be replaced. This is similar to the Seiko 6139/6139 series, and with those the runners are very difficult to find these days, so at some point they will be scarce for the Piguet movements as well, where the 7750 parts will be everywhere for my lifetime and longer I suspect.

The 7750 is every bit as accurate, efficient in winding, and robust as the Piguet movement, and personally I think it exceeds the Piguet movements in all these respects (okay in winding they are a wash, as both are very good). It is far easier to service and get parts for the 7750 than the Piguet movement.

I have said this before many times, but the 7750 in all grades I see on my bench is consistently on average the most accurate movement I service, and that includes all movements from all brands. It was never designed to be a high end movement, but the fact that is has ended up in many higher end watches to me is a testament to it's performance and capabilities.

I am far from being a hater of the Piguet movements, and I have defended it against unrelenting attacks on other forums, but honestly if I had to choose, it would be a 7750 every time based on the technical aspects of the movement. That's not to say the Piguet movement is not a good movement, but I don't personally think it is leaps and bounds above the 7750.

Just my $0.02 Canadian.

Cheers, Al

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Dap, foarte interesant. Multumim Adi.