unmounted mint 1930 Paris Aeropostal Exhibition 1f.50 ultramarine, an unmounted mint corner example (hinged in the margin only), perforated "EIPA30". Very fine. C.6C, FF.4000

細節
unmounted mint 1930 Paris Aeropostal Exhibition 1f.50 ultramarine, an unmounted mint corner example (hinged in the margin only), perforated "EIPA30". Very fine. C.6C, FF.4000