S.G.18,18a. 1867.
1/- Black and rose-carmine. Block including long-tailed "S" variety.
Block of 15 from the top of the sheet with full sheet margins, including the long-tailed "S" variety (Row3/1). Only 2 of the stamps at the top show slightest trace of a hinge mark, all the rest including the variety are Unmounted.
Rare and Exceptional Quality.