One narrow stripe of purple velvet between two stripes of gold rank lace, consisting of two intersecting waved lines, embroidered onto a dark blue, cuff, cloth slip.
As the Royal Navy civil branches' uniforms moved closer to those of the executive, new means of distinction were introduced. One such method was to use coloured cloth in the space in between rank stripes. RNR Engineer and accountant officers wore the same coloured stripes as the Royal Navy. Purple was used to denote the engineering branch.
The curl in the top rank stripe on the cuffs was granted to engineer officers in 1915 and to all other branches in 1918. As such, this item can be dated as pre-1915.