Originally appeared in 1931 and was finely made. It was redesigned for mass production in 1939 and, together with the Mk I*, became the British 'work horse' of World War 2. Three different types of rear sight may be found on this weapon, ranging from a finely machined adjustable leaf to the simple 'L' type flip-over. Many of these weapons are still in service in the British Commonwealth and in former British territories.
Serial No Y7091