That thing is still very common in Pakistan and India and they call it "SAROTA", it is a useful tool for cutting Betel Nut in small pieces to chew, It is available in various designs and shapes and commonly available on E-bay http://cgi.ebay.co.uk/Brass-Betel-Nut-Cutter-Sarota-/250636855556.
In Pakistan and India retail price is around AU$01.