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Omega: What is the point of a sapphire crystal when you AR coat the exterior of the crystal?

22K views 62 replies 47 participants last post by  Realbeard1  
#1 ·
A bit of a rant tonight. As the thread title states: What is the point of using a sapphire crystal when you put AR coating on the exterior of the crystal that can scratch pretty easily? The point of using sapphire is because it is highly resistant to scratching. However, in modern Omega's they put anti-reflective coating on the outside of their crystals. This AR coating is pretty easy to scratch and makes the crystal look bad.

I recently owned a 2017 made SMP 300m that I bought used. The AR on the outside of the crystal was pretty scratched up when I bought it. When I went to sell the watch to one of the major U.S. watch dealers, I was dinged on the sale price because they said the crystal had to be replaced. I don't blame them--it did detract from the appearance of the watch. The price was still fair so I went through with the sale but it ticked me off that Omega uses AR coating on the exterior of crystals. The watch was not abused but the crystal was still scratched to the point it needed to be replaced.

Fast forward to today and I was looking at another preowned Omega, made in 2016, and the crystal is clearly scratched up. At least AR is scratched. WTF? Why does Omega do this? You can put AR coating on just the underside of the crystal and not have to deal with this B.S.

Does anyone have any input from Omega on why they do this? It's a big turnoff for me, and I usually love the Omega brand. I recently bought a new Aqua Terra from Brent L. Miller jewelers (ask for Brad) and now I'm sensitive about the watch because I know the AR coating is going to get scratched. This is not a problem I have with my Rolexes.
 
#9 ·
I don’t know why they put it but I do know that I love the way the crystal almost disappears at most angles and I get to see dial depth. Im also not sure how a crystal AR can be so badly scratched without abuse. Besides, some people might still see Omegas as tool watches but at their price point they are, to me, jewelry which must be cared for. I have cheaper watches as beaters where I don’t care if the AR or the crystal itself gets scratched. For me the AR advantage is worth the trade off, it’s not that expensive to replace once it’s due for service.
 
#10 ·
I'm a big believer that, with a few exceptions, they should just put AR on the inside (not outside) with Sapphire crystal, that way there is still the benefits of Sapphire crystal watch face, and also some level of antireflective coating.
However, honestly, a Sapphire Crystal with scratched AR on the outside, still looks a ton better than hessalite with scratches throughout.. and this was the accepted norm until probably about the late 1980s when Sapphire become the new normal (or thereabouts I believe).
 
#60 ·
To clarify: the issue isn't that the original gentleman does not want AR coating on his watch. He just doesn't understand why Omega applies it to the OUTSIDE. Most other watch makers apply it to the INSIDE (Oris even addresses this issue on their website). This way you get to appreciate the scratch resistance of the saphire crystal and still get anti-reflective benefit. The AR coating itself does scratch quite easily.
 
#21 ·
Im with you on this. Ive never understood Omegas approach to AR. Some of the PO models really need AR but why not put it on the underside of the crystal. Im sure theres a reason but surely the benefits are outweighed by risk of scratching. It makes even less sense with a dive watch. I live by the sea and my watches always take a dunking. All it takes is a grain of sand on the crystal and a wipe with a cloth and you have a scratch.
 
#26 ·
The PO has AR coating on the underside already (as well as on top of it).

1. Wear it and enjoy it
2. If it gets scratched and it bothers you, remove the outside AR (easy), and keep enjoying it
3. When time comes for a service decide if you want to replace the crystal for a new one with double AR coating, or keep it without AR outside (the inside one works, but of course not as well as with both)

And lastly keep enjoying the watch...

Not sure I understand why it's such a big deal to some.
 
#24 ·
I can tell my experience with Sinn U1 (AR on both side). The watch was tegimented and looked brand new even after quite some time. But on certain angles you could see the outside ar having some marks. The sapphire glass was without any marks. It was just annoying. Why would they put ar on the outside?On a 1000m diver?A tool watch? For what?

There is no point in changimg the crystal as the new one will have the same outcome but you can only send it to someone who can remove the outside ar.

Stupid. I just sold it in the end. Only because of idiotic ar on the outside on a tool diver
 
#30 ·
How are you guys scratching your AR coating? Had my 300m about 3 years now. It's worn daily and still looks perfect.

Built like a tank!
Agree. I had SMP300 for over 2 years almost a daily wear and didn't have any scratch on the AR coating. Now, over a year on my PO and the same results. I've never babied my watches but not rough on them either.

Sent from my SM-F926U using Tapatalk
 
#32 ·
Well the AR on inside and out will provide the least reflectivity. Personally I don't like it on the outside due to marks that always occur.
usually easy to remove.
 
#41 ·
Actually it doesn't. The watch in my avatar is my favorite watch and, while made in 2014, has an acrylic crystal. If I get minor scratches on it they can be easily removed with Polywatch. Also, being acrylic, there is an expectation the crystal will get scratched. The point of sapphire is to have a crystal so hard that it won't get scratched, but then Omega defeats that purpose by putting AR on the outside of the crystal that pretty easily gets scratched.
 
#36 ·
I've owned my PO since 2005, never had a problem with AR scratches. The service center didn't even offer to replace the crystal when I took it for an overhaul in 2016. Sounds like a storm in a teacup to me.

Putting AR on the inner side has its own problem, namely risk of peeling off and falling on the dial. Rolex are now offering their Subs with AR inside, so they must have found a solution to that. I still see reflections on my Sub41, but not as many as on my SD43. The PO has almost zero reflections, probably my most legible diver.
 
#37 ·
I thought Omega had AR coating on both sides of the crystal?