CREATE TABLE table_name_26 (year_s__of_manufacture VARCHAR, type VARCHAR, quantity VARCHAR)

Which Year(s) of manufacture has a Type of 1b n2, and a Quantity of 10?
SELECT year_s__of_manufacture FROM table_name_26 WHERE type = "1b n2" AND quantity = 10
SELECT "year_s__of_manufacture" FROM "table_name_26" WHERE "1b n2" = "type" AND "quantity" = 10