This is also the case with the Frock Coat and Numbers 1 and 3 dress. In addition, the Life Guards, the Blues and Royals, the Queens Royal Dragoons, the Royal Scots Dragoon Guards, the Royal Dragoon Guards, and the Royal Lancers all wear white leather gauntlets when mounted. Full dress is still regularly worn on ceremonial occasions by the Foot Guards, the Household Cavalry and the King's Troop, Royal Horse Artillery. It is issued at public expense to these units and to the various Royal Corps of Army Music Bands for ceremonial use. Other units may obtain Full Dress on occasion, as it can be worn whenever a parade is attended or ordained by the monarch or a member of the British Royal Family, including ceremonial parades, state funerals, and public duties around royal residences (such as the Changing of the Guard), or participating in the Lord Mayor's Show. Most regiments maintain full dress for limited numbers of personnel, including musicians and guards of honour (in some cases). However, all of these uniforms must be purchased and maintained from non-public funds. Historically, musicians were an important means of communication on the battlefield and wore distinctive uniforms for easy identification. This is recalled in the extra uniform lace worn by infantry regiments' corps of drums, and the different coloured helmet plumes worn by trumpeters in the Household Cavalry. Shoulder 'wings' are now a distinguishing feature worn by musicians of non-mounted regiments and corps in ceremonial forms of dress. Originally, wings were embellishments in some foot regiments, so that, in 1750, nineteen out of forty-nine foot regiments wore them, although they had been forbidden in 1730. In December 1752, the wings were reserved for grenadier companies only, followed by the light infantry in 1770. Within less than three decades, these initially small and modest features grew in size, became stiffened and lavishly trimmed with lace and fringes. After a design change, in 1836, the wings disappeared by the end of the Crimean War, 1855, and became solely the privilege of military musicians. Headgear, as worn with full dress, differs considerably from the peaked caps and berets worn in other orders of dress: field marshals, generals, lieutenant generals, major generals, brigadiers and colonels wear cocked hats with varying amounts of ostrich feathers according to rank; the Life Guards, Blues and Royals, 1st The Queen's Dragoon Guards and Royal Dragoon Guards wear metal helmets