CREATE TABLE table_20203 ("Ecosystem" CLOB, "Date of issue" CLOB, "Place of issue" CLOB, "No. stamps in sheet" FLOAT, "Face Value" CLOB, "Printer" CLOB)

When the face value is 42 , what was the issue's date?
SELECT "Date of issue" FROM table_20203 WHERE "Face Value" = '42¢'
SELECT "Date of issue" FROM "table_20203" WHERE "Face Value" = '42¢'