Armorial platter unidentified arms 1760

Chinese export porcelain platter bearing the arms of Hartland quartering Seaman with Brace in pretence, c.1755
From Chinese Armorial Porcelain Vol. II by David Sanctuary Howard, page 394:
“The arms, which are clearly identified in every respect in Betham’s manuscript herald painter’s order book of 1733/4 are of Hartland, Argent on a bend sable three bucks’ heads erased or, quartering Seaman, Barry wavy of six argent and azure, a crescent or, with in pretence Brace, Sable a bend between two hands and arms couped at the elbow argent, habited in mail proper. The crest is of Seaman, A demi seahorse salient argent.
The Hartland family, originally of Devond, moved to Gloucestershire where they lived near Newent at Cagley Hall. It may well have been at this time that there was a marriage with a Brace of Worcestershire. The Seaman family was long seated at Middlewich in Cheshire – certainly from before 1612 to the 19th Century, although a William Seaman of this family resided in London throughout the first half of the 18th Century. It is not clear why the Seaman crest is used in preference to that of Hartland.
In the 19th Century a branch of the Hartland family with this coat (but Hartland crest) quartered the arms of Dixon and lived at The Oaklands, CHarlton Kings, in Gloucestershire, but their recorded genealogy only goes back to a Nathaniel Hartland who married in 1825 a Miss Dixon, and was son of Nathaniel and Anna Hartland.”
16.5″ across

Armorial platter unidentified arms 1760 detail 1