Australia 1882M Half Sovereign PCGS XF45
S-3863B – fifth head type half sovereign. One of the rare issues.
Walter Eigner has a useful page devoted to the shield reverse half sovereigns: http://numistip.com/Museum/1882-M_Truncated_Bust_Half_Sovereign_593.html
Details of this coin can be found by clicking on the button below (opens in new tab):