Question: What is the type of the locomotive which was delivered in 1857-59?
SQL: SELECT "Type" FROM "2-17943468-1" WHERE "Delivered" = '1857-59';

Question: What is the highest quantity of the B IX k.b.sts.b.?
SQL: SELECT MAX("Quantity") FROM "2-17943468-1" WHERE "K.B.Sts.B. Class" = 'B IX';

Question: What is the lowest quantity of the 1B n2 type, which was retired in 1907-12?
SQL: SELECT MIN("Quantity") FROM "2-17943468-1" WHERE "Type" = '1B n2' AND "Retired" = '1907-12';