NOS OT2500 Omega Centenary...

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Is there any reason to doubt that the watch has the engraving? The sticker could simply be covering it, no?
Also, not sure whether the engraving being present or not would affect the price much. After all, the buyer likely bid the 60k SEK because of the condition.

Because not all ref. 2500s have engraved casebacks:
https://omegaforums.net/threads/centenary-2500-jub-serial-numbers.12752/page-3

Price still seems high, despite the condition of the watch. More than double Achim’s prediction.