VERY FINE. A RARE ORIGINAL-GUM BLOCK OF FOUR OF THE 1876 10-CENTIMES GREEN SAGE ISSUE.
While single examples are scarce but obtainable, multiples are surprisingly rare. Yvert gives a 50% premium for blocks of four over the value of four singles.
With 2020 Roumet certificate. Scott $5,400.00 as singles. Yvert €8,400 as hinged block