CREATE TABLE table_name_90 (year_s__of_manufacture VARCHAR(255), quantity VARCHAR(255), type VARCHAR(255))
Which Year(s) of manufacture has a Quantity larger than 39, and a Type of 1′c1′ h2t?
    
SQL: SELECT year_s__of_manufacture FROM table_name_90 WHERE quantity > 39 AND type = "1′c1′ h2t"