For over a century and a half, since the Uniform Regulations of 1856 were introduced, identification of rank amongst officers in the Royal Navy, its branches and its reserves has not been restricted to a single, or even small number, of insignia. Rank may be seen on jacket cuffs, on shoulder badges, on shoulder boards and on epaulettes. It may be seen on swords and buttons, and in the manner in which buttons are worn. Cap peaks indicate rank, as do collars, cocked hat ornaments and cuff slashes. 750 colour photographs and diagrams