The both snipers K31/42 and K31/43 were produced from 1943-1945. The bigger part of the 2241 rifles were K31/42`s and only around 600 pieces K31/43.This information is from the curator of the RUAG museum in Thun,former the W+F collection. So the K31/43 is the rarest scoped ordinance Swiss sniper mod...