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I am trying to identify the correct crystal for an Omega case reference ST 511.0470.
I have looked through the available case-reference and crystal information, but I have not been able to determine any reliable correspondence between this case and a specific Omega plexiglass reference.
The watch needs a rectangular plexiglass crystal and the crystal groove measures 21 by 21 mm. From photos I found online, it's sitting about 1mm above the case.
Could someone with access to an old…
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