Zamak 2 was introduced as the zinc alloy to be used on the HJ knife in Nov 1938 but Zamak 2 obviously hints at a previous alloy named Zamak 1. Does anyone know exactly when Zamak (zinc) hilts were first used on the HJ knife? It is commonly said that zinc was introduced on the knife in 1937 but I haven't seen proof of that on the forum - only for Zamak 2 in Nov 1938.