unmounted mint Block Larger Than four BARBUDA: 1977 (Dec.) Royal Visit perf. 11½x12 $2.50 sheetlet of five + label, variety overprint inverted; very rare and possibly unique, together with perf. 11½x12 set of five sheetlets with blue overprints; 1983 (21 Oct.) perf. 14½, surcharges on Royal Wedding values, two sheetlets of six, one showing variety surcharges on the wrong values, the other with variety surcharges omitted; unmounted mint