Well spotted. It is all correct, but needs clarification. The blade from Luristan has spheroidal cementite suggesting it is crucible steel, but the date is uncertain as they were looted and therefore lost all context and dating. The earliest excavated and well dated blade is from Taxila (1st century AD). The second and third earliest excavated are from the Russian Caucasus (3rd-4th century AD), the fourth earliest blade is from Sasanian period. The blades from Luristan and Sasanian Perisa are the two earliest known from IRAN, not the earliest in the world.
