The Black Watch tartan, also known as Government No. 1, is a simple but iconic pattern of dark green and navy, with black crossing lines. It is known as a universal tartan, meaning it can be worn by anybody; and unlike clan tartans, its variations are minimal, but it can be woven in Modern, Ancient or Weathered styles for different finishes. It originated in the early 18th century with the Black Watch regiment, becoming one of Scotland’s most famous military tartans.