unmounted mint Block Larger Than four 3c. blue-green, lower margin interpanneau block of six showing the full cracked plate in gutter margin variety; light toning, unmounted mint. S.G. 172, Chan 140

Details
unmounted mint Block Larger Than four 3c. blue-green, lower margin interpanneau block of six showing the full cracked plate in gutter margin variety; light toning, unmounted mint. S.G. 172, Chan 140