Massive 17th century steel armorial desk wax seal

A Massive, heavy and substantial desk wax seal dating to the 17th century and featuring a tapering long steel shaft measuring 150mm with centering cross towards the matrix end and terminating in a flat cut section with matrix engraved with an elaborate armorial under helm and crest, with beaded border.

An unusual and rare piece in this size and condition - appears rather crude at first impression but engraving is actually fine, considering age.