Hi Richard, nice to hear from you

(hows that scabbard coming ?)
There were many battles fought in the Afghan Wars between the British / Indian soldiers and the Afghani Tribesmen. (some links below). Bearing in mind the strategic significance of the Khyber Pass, a lot of conflict has been centred there for centuries. The picture below has the caption "Captain Colin Mackenzie, Madras Army, after his release from captivity". Interestingly he is shown wearing a Khyber Knife, perhaps its popularity spread to some of the British/Indian soldiers ?
http://www.britishbattles.com/first-...kabul-1842.htm
http://66.102.9.104/search?q=cache:F...lnk&cd=3&gl=uk