Philately. Mi.10H (earlier MI.I), PROVISORIUM LONGJI, letter with bisected stamp Yacht 20Pfg, CDS LONGJI / CAMEROON 19/5 11; next to service pmk postal office; very fine letter, certificate R. Steuer BPP, c.v.. 9.000EUR(!), scarce (Image 1) (Image 2) (Image 3)

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