Lot 40488 – 1855-57 1s Green in irregular block of 13 on large

1855-57 1s Green in irregular block of 13 on large parcel piece along with 6d lilac, tied by “30” London numerals, with London and Derby ds adjacent, trimmed wing margins at right otherwise fine, probably the largest known block (SG £4’700+ for two blocks of four plus singles)