Royal Naval Reserve
It was one of a pair of decorations which were instituted simultaneously, the other being the Decoration for Officers of the Royal Naval Reserve, often referred to as either the Royal Naval Reserve Officers' Decoration or the Royal Naval Reserve Decoration. The badges of these two decorations are identical and both initially hung from the same all-green ribbon, until a new ribbon was introduced for the Decoration for Officers of the Royal Naval Volunteer Reserve in 1919.