Why did Nepal retain Vickers QF 3.7-inch anti-aircraft guns for so long?
Short answerThey were plentiful, workable at Nepal's operating altitudes, and useful in general-purpose ground roles as well as air defense.
NotesMore than 10,000 Vickers QF 3.7-inch anti-aircraft guns were produced between 1937 and 1945, leaving substantial stocks. Nepal's continued use is attributed to limited spending and the gun's ability to operate at high-altitude positions where suitable missiles had been difficult to employ. Its history of anti-tank use also suggests a general-purpose role beyond air defence. The figure given is 45 guns in Nepal, while possible continued service in Sri Lanka remains uncertain.