Laser engraved crown on crystal on top and bottom side of crystal?

[Mystro]

I was taking some insurance macro reference pics of my Sea Dweller 50th and noticed the laser engraved crystal is on the top and bottom side of the crystal. Is this new?? I never noticed this on any of my other Rolex watches with the engraved crown only on the top side. This was the hardest of all my Rolex watches to get a pic of the engraved crown on the crystal but a hi lume tactical light to the side reveals it. Shows how thick the crystal is.

[jrs146]

I’ve never seen that before!


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[brandrea]

Very interesting ...

[padi56]

The LEC is laser-etched into the crystal its not on the crystal surface or underneath, its made up of hundreds of dots set at different heights throughout the crystal, (so it doesn’t create a weakness in the crystal) this is what makes it barely visible to the naked eye.

[Mystro]

Originally Posted by padi56

The LEC is laser-etched into the crystal its not on the crystal surface or underneath, its made up of hundreds of dots set at different heights throughout the crystal, (so it doesn’t create a weakness in the crystal) this is what makes it barely visible to the naked eye.

So is this a illusion/reflection at the top and bottom edge of the crystal?

[Swiss Mad!]

Originally Posted by padi56

The LEC is laser-etched into the crystal its not on the crystal surface or underneath, its made up of hundreds of dots set at different heights throughout the crystal, (so it doesn’t create a weakness in the crystal) this is what makes it barely visible to the naked eye.

Surely if it's laser etched it can only be on the surface?
If it was all the way through the crystal it would have to be put in during the manufacturing process.
The pictures in this thread seem to show two separate layers of etchings on either side of the crystal with nothing in between.

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[schoolboy]

Wow that’s weird.

Is this the case only on the SD 50th?


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[schoolboy]

I know you own a 116610lv Mystro, is that the case there too??


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[lenfried29]

I think it's a reflection created by your tactical flashlight

[Mystro]

Originally Posted by schoolboy

I know you own a 116610lv Mystro, is that the case there too??


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I just dug up this old pic from my LVc. I can see a lower crown. The crown was much easier to see on the crystal of my 2017 LVc. I didn’t have any trouble seeing it without a flashlight on the Sub.
I can’t tell if the thicker crystal of the SD50th makes seeing the laser etched crown much harder to see? I absolutely can’t see it at any angle even under a macro pic without a bright tactical light.

[schoolboy]

Originally Posted by Mystro

I just dug up this old pic from my LVc. I can see a lower crown. The crown was much easier to see on the crystal of my 2017 LVc. I can’t tell if the thicker crystal of the SD50th makes seeing the laser etched crown much harder to see.

I can see it too.

However, the lower one on the LVc looks like it’s super close to the dial where as the lower one from the DS 50th doesn’t look very close to the dial.

Maybe the lower one on the LVc is just a reflection of the LEC?

Because I can also see a reflection of the engraved rehaut.


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[Mystro]

I would love to see other watch pics of the LEC. I find how Rolex does these Easter eggs fascinating.

[GradyPhilpott]

Peter is correct and etching is not the right terminology, although I'm not sure what to actually call it.

Each dot is actually a little star and they are at different levels within the crystal.

There is a diagram floating around on the internet that shows the detail and gives a more technical description.

I believe that it was Jocke who posted here first and I think I have it somewhere, but I don't know where at the moment.

I will post it as soon as I find it.

[Chronographer]

Very nice. It's a reflection. It further proves the point that Rolex crystals are nearly perfect wrt light transmission.

[lenfried29]

Originally Posted by GradyPhilpott

Peter is correct and etching is not the right terminology, although I'm not sure what to actually call it.

Each dot is actually a little star and they are at different levels within the crystal.

There is a diagram floating around on the internet that shows the detail and gives a more technical description.

I believe that it was Jocke who posted here first and I think I have it somewhere, but I don't know where at the moment.

I will post it as soon as I find it.

LEC diagram

[GradyPhilpott]

Gentlemen,

Here is the link to the diagram with myriad information about the LEC.

http://www.watchwallpapers.com/laserlogo.htm

Originally Posted by lenfried29

LEC diagram

Thanks!

[Mystro]

This is awesome. A real watch discussion that doesn’t include prices, “is it safe” or resale value. Wait a miniute,...I just screwed my own thread by including these topics.

[schoolboy]

Originally Posted by Mystro

This is awesome. A real watch discussion that doesn’t include prices, “is it safe” or resale value. Wait a miniute,...I just screwed my own thread by including these topics.

Haha


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[Devildog]

Originally Posted by Mystro

I was taking some insurance macro reference pics of my Sea Dweller 50th and noticed the laser engraved crystal is on the top and bottom side of the crystal. Is this new?? I never noticed this on any of my other Rolex watches with the engraved crown only on the top side. This was the hardest of all my Rolex watches to get a pic of the engraved crown on the crystal but a hi lume tactical light to the side reveals it. Shows how thick the crystal is.

Captured “3” on mine

[J!m]

Originally Posted by Swiss Mad!

Surely if it's laser etched it can only be on the surface?
If it was all the way through the crystal it would have to be put in during the manufacturing process.
The pictures in this thread seem to show two separate layers of etchings on either side of the crystal with nothing in between.

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Actually, since it’s a laser, it has a very narrow depth of focus. It will only cloud the crystal at a very specific point, so the depth is easily controlled.

Haven’t you ever seen those “3-D” laser etched acrylic cubes? With an image inside you can see from all sides? Same idea- just higher watt density for sapphire as compared to acrylic.

[Wcdhtwn]

In the right light I can see the crown without any magnification. Much easier to see/find than on my GMT II.

[stylinleems]

Originally Posted by Devildog

Captured “3” on mine

That looks so cool, great pic!!

[FTX I]

Originally Posted by brandrea

very interesting ...

+1

[Dirt]

Originally Posted by Swiss Mad!

Surely if it's laser etched it can only be on the surface?
If it was all the way through the crystal it would have to be put in during the manufacturing process.
The pictures in this thread seem to show two separate layers of etchings on either side of the crystal with nothing in between.

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Multiple low powered lasers are focused on a single point within the Crystal structure.
The result is a melted point/dot.
The dots are positioned in a patern to depict the shape of the Coronet within the Crystal.
The Crystal is simply moved predominately in a single flat plain in order to make the dotted image.

New surgical proceedures to perform highly complex brain surgery that no human can do, are accomplished the exact same way with the aid of world class detailed mapping of the brain.
And the patient is moved throughout multiple dimentions with the focal point of the laser being fixed.

[Swiss Mad!]

Originally Posted by Dirt

Multiple low powered lasers are focused on a single point within the Crystal structure.
The result is a melted point/dot.
The dots are positioned in a patern to depict the shape of the Coronet within the Crystal.
The Crystal is simply moved predominately in a single flat plain in order to make the dotted image.

New surgical proceedures to perform highly complex brain surgery that no human can do, are accomplished the exact same way with the aid of world class detailed mapping of the brain.
And the patient is moved throughout multiple dimentions with the focal point of the laser being fixed.

Blimey!
All seems like an awful lot of trouble to go to just to laser etch a watch crystal that 99% of people can't even see..lol

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