- 1967-69 ½c. to $10, 1970-71 ½c. to $10 with both $4, and a group of 1968-73 surcharges/overprints with 1970 $4 surcharge set of four and some with minor varieties; fine mint; also Official 1975 set (less 18c.) used. Cat. #300 approx. (164)