CREATE TABLE table_42311 ("Country" TEXT, "Automobile Name" TEXT, "Manufacturer" TEXT, "Engine Make/Capacity" TEXT, "Year" TEXT)

In what year was Letecke Zavody N.P., Jinonice the manufacturer?
SELECT "Year" FROM table_42311 WHERE "Manufacturer" = 'letecke zavody n.p., jinonice'
SELECT "Year" FROM "table_42311" WHERE "Manufacturer" = 'letecke zavody n.p., jinonice'