Anonymus 457 was a patrikios and komes of the theophylakton basilikon Opsikion; owner of a seal dateable to the second half of the eighth century; his name is mostly missing, but apparently ended with the letters νας: Zacos and Veglery 2603. Obv.: cruciform monogram of Κύριε βοήθει, with τω - σω - δου - λω in the corners. Rev.: ...να π - ατρικ' και κ - .μ' του θεο. - υλ' β' οψι - κιου. The titles read: ... πατρικίῳ καὶ κόμητι τοῦ θεοφυλάκτου βασιλικοῦ Ὀψικίου. The name could be e.g. Petronas.

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