A FOG single of the 1/2c black from the 1870-1893 Small Queen Issue, late Montreal printing, MM-b paper, perf 12.2.
Unitrade does not differentiate between Montreal & Ottawa printings on this value, but the late Montreals are considerably scarcer than the second Ottawa printings. It is more in line with #34ii, the thick white paper.
Unitrade doesn't list this variety, so we estimate it at $30. The stamp offered here grades 66 as follows:
