Speedmaster logo on glass

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Hello,

does omega engrave logo on sapphire sandwich speedmaster or just hesalite version ?

310.30.42.50.01.002​


thanks in advice
 
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Its on the Hesalite only, the sapphire watches don't get the omega logo.
 
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Its on the Hesalite only, the sapphire watches don't get the omega logo.

Not entirely true. There have been several Omega sapphire crystals with the logo.
 
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Not entirely true. There have been several Omega sapphire crystals with the logo.
Speedmaster? I wasn't aware of any.
 
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I’ll check the new FOIS when I get a chance as I suspect that is one but as I say several other sapphire crystals have been signed.
 
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I’ll check the new FOIS when I get a chance as I suspect that is one but as I say several other sapphire crystals have been signed.
Correct, the newly released FOIS does have an Omega logo engraved into the sapphire crystal. I believe that is a first in the 'regular' 3861 production, the 321's like the EW come with an engraved sapphire crystal too.
 
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The logo found on some sapphire crystals, like the 321, are internally etched by laser, very different than how the symbol is made on the normal hesalite crystal.
 
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I remember reading on fratello that omega logo are etched on 3861 sapphire.