CREATE TABLE table_34808 ("Year of Issue" FLOAT, "Description" CLOB, "Weight" CLOB, "Diameter" CLOB, "Thickness" CLOB, "Edge" CLOB)

Which Thickness has a Year of Issue smaller than 1983?
SELECT "Thickness" FROM table_34808 WHERE "Year of Issue" < '1983'
SELECT "Thickness" FROM "table_34808" WHERE "Year of Issue" < '1983'