Hallmarked silver identity tag belonging to Commander Archibald Thomas Stewart, Royal Navy

Archibald Thomas Stewart, O.B.E., R.N. was born on 10 January 1876 in Sewendahl, Cape Colony, South Africa. His father, Thomas Brown Stewart, was a Lieutenant Colonel in the British Army Service Corps.
He joined the Royal Navy in 1890. According to The Dreadnought project, Stewart was promoted to the rank of Lieutenant on 30 September, 1898. In July 1906, he passed a preliminary examination in French. He completed a command appointment in 'Quail' and was promoted to the rank of Lieutenant-Commander on 30 September, 1906. He commanded 'Thrasher' for six months and took a short course in signals at Portsmouth before July 1907 when he travelled to France for four months additional study. He would pass for an acting Interpreter in the language in January 1908.
Acting Commander Archibald Thomas Stewart, R.N. was made an Officer of the Most Excellent Order of the British Empire in June 1918 for his work as the British Naval Representative at Bizerta.
He was placed on the retired list at his own request with the rank of Commander on 23 October 1920.

A cross pattée (also known as a cross patty, cross formy, or Templar cross) is a type of Christian cross where the arms are narrow at the centre and flare out to a broader shape at the edges, often with curved or straight lines. It is characterised by its distinctive "footed" appearance, hence the French term "pattée" meaning "footed".