This is the last full dress worn by officers of the regiment, other than the Royal Horse Artillery. This dress was re-introduced for officers after the First World War, to be worn at levees and similar occasions. The busby replaced the ball-topped helmet in 1926, reverting to the before 1878. The Royal Artillery busby differs from the Royal Horse Artillery type in having no cap lines. Sources: Items of dress in the R.A. Museum and Dress Regulations.