Black Watch (Royal Highland Regiment) Cap Badge. United Kingdom.

The Black Watch, 3rd Battalion, Royal Regiment of Scotland (3 SCOTS) is an infantry battalion of the Royal Regiment of Scotland.
The regiment was created in 1881, when the 42nd (Royal Highland) Regiment of Foot (The Black Watch) was amalgamated with the 73rd (Perthshire) Regiment of Foot.
It was known as The Black Watch (Royal Highlanders) from 1881 to 1931 and The Black Watch (Royal Highland Regiment) from 1931 to 2006.
The Black Watch was amalgamated into The Royal Regiment of Scotland in 2006. The Black Watch became the new regiment's 3rd Battalion.
In the aftermath of the First Jacobite Rebellion of 1715, Independent Companies of militia were raised from loyalist Highland clans for policing and peacekeeping duties. These companies were commonly known in Gaelic as ‘Am Freiceadan Dubh’, or ‘The Black Watch’, due to their unpopular nature and their dark green government-issue tartan - the regiment wore kilts as part of its everyday uniform until 1940.
This badge features a rayed and faceted star similar to the Star of the Order of the Thistles. Upon the centre, within a wreath of thistles, an oval frosted circle bears the burnished motto: 'nemo me impune lacesset' (meaning 'no one attacks me with impunity'). This is surmounted by a monarchial crown. Within the circlet the figure of St Andrew is depicted holding his cross upon a frosted ground.