My First Omega (Case is slightly thicker than spec?)

Posts
8
Likes
2
Happy Saturday everyone,

I recently purchased my first Omega and it arrived yesterday from Japan. It was through the major Japanese re-sale company "Komehyo" on eBay. It passed eBay's authentication process. It came with the box and all cards filled out with AD stamp, warranty date, etc. The warranty is still good for two years.

As a precaution, I did a slew of my own tests to check for authenticity. I started with the movement, specifically the escapement, which seemed legitimate. I checked the movement with a neodymium magnet, and it wasn't affected at all. (Every other watch I own stops when the magnet is applied.) All SN's match, and I was able to print off the Master Chronometer certificate on Omega's website using the card information. Furthermore, I verified that the Omega Chronometer certificate precision test results match the watch. It said that it gained 1.8 seconds per day on the test, and the actual watch gained 1 second in about 14 hours. (Lines up.)

The only issue I could find was that the case thickness measured 14.24 mm, and it should have been 13.9 mm. As a sanity check, I checked my caliper calibration by measuring several different feeler gauge sets, and it was dead on to the hundredths. When I measured it, I took multiple measurements along the domed crystal to verify the thickest area. There were no stickers, etc. on the case back.

My understanding is that it would have to be a super fake to be able to match the same daily precision, anti-magnetism, have the proper co-axial escapement, etc... Is the thickness difference enough of a concern to warrant further investigation / authentication? (My return window is 2 weeks.)

Any insight would be greatly appreciated!

 
Posts
5,719
Likes
26,965
Why did you blur the refno, it's more common to blur the serialno?

It could be the caseback is not fully tightened, in the pic from the side there seems to be a gap.
 
Posts
8
Likes
2
Why did you blur the refno, it's more common to blur the serialno?
Honestly blurring any of it probably isn't necessary. However, if an unscrupulous person had the SN, Chronometer reference, and the access code altogether they could theoretically make fake cards that also checks out with Omega's Master Chronometer website. Blurring it has nothing to do with my own privacy, I'm trying to protect the next guy. Maybe I'm just a bit paranoid, but I figure there are those who go to great lengths to defraud and profit.

I'll check that caseback and get back to you. Thanks!
 
Posts
8
Likes
2
Why did you blur the refno, it's more common to blur the serialno?

It could be the caseback is not fully tightened, in the pic from the side there seems to be a gap.
I just verified the caseback is fully secure. I think it was just the angle in that photo.
 
Posts
5,719
Likes
26,965
Blurring it has nothing to do with my own privacy, I'm trying to protect the next guy. Maybe I'm just a bit paranoid,
Well, the refno is visible on your metas certificate and the ebay card.
 
Posts
8
Likes
2
Well, the refno is visible on your metas certificate and the ebay card.
Fair enough, but this is getting outside the scope of my post. Is a .34 mm difference enough to be a concern?
 
Posts
5,719
Likes
26,965
I don't see anything wrong with the watch itself, there are matching cards and watch, ebay authentication, access to metas, country of origin so nothing really screams fake.
Edited:
 
Posts
23,034
Likes
51,490
If the movement is a legit Omega movement, I don't think any additional checking is really necessary.
 
Posts
1,773
Likes
2,593
I’d think the weight would be the harder target for the fakers to hit. If that’s right, and the movement checks out, I wouldn’t lose any sleep.
 
Posts
715
Likes
2,142
It looks just like the one I'm wearing right now. I think you're ok. I'm not sure Omega can always be trusted for every single measurement. And did you get the measurement from Omega or another website?

edit: I also am not sure the caseback is perfectly snug. Is there even a slight gap? Or is that just a shadow on yours?
 
Posts
1,773
Likes
2,593
Tim Mosso, in his YouTube review, says it’s an even 14mm. I think when it gets down to a couple tenths of a mm, several variables come into play that make relying on the Omega tech specs unwise.
 
Posts
8
Likes
2
It looks just like the one I'm wearing right now. I think you're ok. I'm not sure Omega can always be trusted for every single measurement. And did you get the measurement from Omega or another website?

edit: I also am not sure the caseback is perfectly snug. Is there even a slight gap? Or is that just a shadow on yours?
I got the measurement from Omega, yup. I guess I'm just being a bit too analytical. I've always heard that rep's tend to be slightly thicker because they can't make the movement exactly right, so it just made me a bit nervous.

As for the caseback, someone else actually brought that up to me on Reddit, and I verified it was secure. I think it was just that photo in particular.
 
Posts
8
Likes
2
Tim Mosso, in his YouTube review, says it’s an even 14mm. I think when it gets down to a couple tenths of a mm, several variables come into play that make relying on the Omega tech specs unwise.
Thank you, I'm not as worried now that you guys have sort of eased my mind. I figured the thickness would be fairly consistent, but it makes sense that it may not be because of the case tightness, how the crystal was set, etc.

My biggest concern was that it might have been some crazy fake that had everything right except the case... Which doesn't quite make any sense either.
 
Posts
715
Likes
2,142
Thank you, I'm not as worried now that you guys have sort of eased my mind. I figured the thickness would be fairly consistent, but it makes sense that it may not be because of the case tightness, how the crystal was set, etc.

My biggest concern was that it might have been some crazy fake that had everything right except the case... Which doesn't quite make any sense either.
I think you're good. And all of these gain almost exactly 2 seconds per day, that's also a little hard to fake.

Here is mine at similar angles.

 
Posts
3,588
Likes
7,559
I’d think the weight would be the harder target for the fakers to hit. If that’s right, and the movement checks out, I wouldn’t lose any sleep.

Bph. And yes the weight would be wrong assuming you can control for missing link weight (if any)
Edited:
 
Posts
132
Likes
103
I think the casing on modern Omegas are quite thick due to the new Co-Axial Caliber movements being more advanced
 
Posts
3,588
Likes
7,559
I think the casing on modern Omegas are quite thick due to the new Co-Axial Caliber movements being more advanced

This is not correct. The Omega 89XX movement is thinner than Rolex's no date 3230 (or whichever number it is) in the current no date sub.

The current heritage shown should measure 13.88mm thick. The summer blue version with a steel caseback measures ~13.7mm.
 
Posts
715
Likes
2,142
I think the casing on modern Omegas are quite thick due to the new Co-Axial Caliber movements being more advanced
They are not. It is a design decision to make them as thick as they are. The sapphire back adds a good bit.
 
Posts
3,588
Likes
7,559
They are not. It is a design decision to make them as thick as they are. The sapphire back adds a good bit.
Probably about 0.2mm. The domed crystal also adds a decent amount.