A shilling was a coin used in England from the reign of Henry VII (or Edward VI around 1550). The shilling continued in use after the Acts of Union of 1707 created a new United Kingdom from the Kingdoms of England and Scotland, and under Article 16 of the Articles of Union, a common currency for the new United Kingdom was created.
The Armstrong rifled breechloading guns of the 1850s-1860s. In 1854, Armstrong approached the Secretary of State for War, proposing that he construct a rifled breech-loading 3-pounder gun for trial. Later increased in bore to 5-pounder, the design performed successfully with respect to both range and accuracy.