An ungraded single of the 1/2d yellow green Britannia from the 1860 Britannia Issue, rare pin-perf 12.5.
Traces of the perfs sufficient to determine the gauge are visible at the top center & lower right. These were rare provisionals used by the postmasters while awaiting supplies of the perforated stamps. Examples with intact perfs are exceedingly rare with most having much mutilated perfs.
Gibbons values this at £650, so we estimate it at $50.
