Learn how to say Hallmarks correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word hallmark:
a mark stamped on articles of gold, silver, or platinum by the British assay offices, certifying their standard of purity.
a distinctive feature:
the tiny bubbles are the hallmark of fine champagnes
stamp with a hallmark:
he was reprimanded for not hallmarking his work
mark as distinctive:
this attitude hallmarks many a Briton’s behaviour abroad
early 18th century (as a noun): from Goldsmiths’ Hall in London, where articles were tested and stamped with such a mark