Byzantine lead seal, Constantine(?), c. IX century

Cruciform monogram: θ central, down B, right K. Angles:
(KO)N- C(T)A/
(N)TI-...υ
Cruciform invocative monogram (type V DOC);
At the end of upper arm Ω, down Α, left H, right C. in the quarters:Tω-ΔΑ/…-ωN
28.3mm / 25.3g