CREATE TABLE table_64343 ("Class" TEXT, "Railway number ( s ) " TEXT, "Quantity" FLOAT, "Year ( s )  of manufacture" TEXT, "Type" TEXT)

Which Class has a Type of 1 c n2t?
SELECT "Class" FROM table_64343 WHERE "Type" = '1′c n2t'
SELECT "Class" FROM "table_64343" WHERE "Type" = '1′c n2t'