Air Mail unmounted mint Block of Four 1931 Air, no watermark, 15c block of four, variety imperforate between horizontally , fine unmounted mint. Scarce. S.G. 192a, 800. Photo
Air Mail unmounted mint Block of Four 1931 Air, no watermark, 15c block of four, variety imperforate between horizontally , fine unmounted mint. Scarce. S.G. 192a, 800. Photo
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.jpg "Source: Christie's")
.jpg "Source: Christie's")
