Hong Kong SG81 10c purple and blue/blue wmk MCA block of 54 FRESH U/M RARE

1904-06 10c purple and blue/blue wmk MCA block of 54 (6×9) with central vertical gutter showing interrupted jubilee lines at rows 5 and 6 from the upper half of a sheet brilliant unmounted o.g. (hinged in margin and gutter). Folded vertical perfs and light horizontal gum bends still very fine and exceptionally fresh. A spectacular multiple rare in this positional form and condition. Cat 2160 as basic mounted mint singles (BIG Premium for U/M)