Osa (Perm Government). 1890 (24. June) Cover front locally used in Osa bearing 1890 2kop green cancelled by oval datestamp in blue
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Osa (Perm Government). 1892 (March) Double-weight envelope locally used in Osa bearing four 1892 2kop carmine and pale green background cancelled by oval datestamp in violet
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Osa (Perm Government). 1893 (27 Jan.) Envelope from Moscow to Osa bearing on reverse 1892 2 kop. red and pale green cancelled by oval datestamp in violet and imperial Russia 7 kop. blue cancelled by 28/1 cds
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Osa (Perm Government). 1899 (Feb.) Envelope locally used in Osa bearing on reverse 1897 4 kop. ochre-brown and light green block of four and 1898 2 kop. blue-green cancelled by oval datestamp in violet, ex Fabergé
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Osa (Perm Government). 1896 (June) Envelope locally used in Osa bearing on reverse 1895 2 kop. light blue and yellow-rose cancelled by oval datestamp in violet
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Osa (Perm Government). 1899 Envelope locally used in Osa bearing on reverse 1899 2 kop. black and blue-green tied by black pen cancel
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