The 3rd/4th City of London (Sharpshooters) Yeomanry 18mm domed button by Hamburger is a unique collectable piece from the era of World War I. This button, issued by the British Army in Great Britain, features a military theme and is a part of the jackets worn by soldiers during this historic period. It is a small yet significant piece of militaria that represents the service and dedication of the soldiers who fought in the First World War.