Merodach-baladan II,
chief of the Bit-Yakin tribe
and then
King of Babylon
reigned 722-710 + 703-702 BCE
boundary stone (kudurru)

The king is evidently granting
property rights to one of his clients.

Sources: Albert T. Clay, Light on the Old Testament from Babel, 1906.
Ira Maurice Price, The Monuments and the Old Testament, 1925.