1979 Islamic Revelution 8r orange and brown, mint nh block of four showing OVPT INVERTED & SHIFTED, very fine and scarce (Image)

1979 Islamic Revelution 8r orange and brown, mint nh block of four showing DOUBLE OVPT, BOTH INVERTED, very fine and scarce (Image)

1979 Islamic Revelution 10r deep yellow green, mint nh block of four showing OVPT INVERTED, very fine and scarce (Image)

1990 Telecom. 50f multicoloured, vertical top marginal pair IMPERF HORIZONTALLY in margin only, fine and scarce (Image)