Insignia
From 11 July 1900, Conductors were authorised to wear a crown within a laurel wreath on their lower sleeve and Sub-Conductors a crown, although they did not start actually wearing these until 1901 and 1904 respectively. In 1915, Conductors were authorised a crown in a laurel wreath and Sub-Conductors the royal coat of arms. In 1918, Conductors began wearing the royal arms in a laurel wreath, still their badge of rank, and Sub-Conductors (renamed 'Staff Sargeant Major' in 1968) the royal arms alone. Like RSMs and all other WO1s, Conductors wear Sam Brownes.
Read more about this topic: Conductor (Army)