David 12 was a basilikos protospatharios; owner of a seal dateable to the ninth century: Schlumberger, Sig., p. 590, no. 3 (facsimile) (eighth century). Obv. : invocative monogram of Θεοτόκε βοήθει with the legend τῷ σῷ δούλῳ. Rev.: Δα(β)ιδ β(ασιλικῷ) - α' σπαθα - ριω. According to W. Seibt (private communication), this seal should be dated to the ninth century.

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