I beg to differ. I brought my 2531.80 Seamaster to an Omega Boutique for servicing and they wouldn’t touch it since it didn’t have the caseback serial. Mine actually was an early grey market buy, from the time they removed the serials, but I wasn’t claiming warranty service, just a paid for routine maintenance. Still, they said they couldn’t accept it.
Fortunately a local watchmaker had no problem accepting it for service (at a much lower cost than Omega).
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