1921 '10' Yugoslavia (IMPERFORATED) (Image)

1928-29 0.50p Lebanon, French Mandate, French Colonies (INVERTED Overprint, Print Error, CV $50) (Image)

1912-13 Morocco, French Colonies (IMPERFORATED, Canceled) (Image)

1975 10r Iran, Block of Four (MISSED Value in Persian, Print Error, CV $40, MNH) (Image)

1925 1/8p Saudi Arabia (DOUBLE Overprint One INVERTED, Print Error, MNH) (Image)

1925 1/2p Saudi Arabia (Inverted Blue Overprint, Print Error, CV $50) (Image)

1925 1.5p Saudi Arabia (INVERTED Black Overprint, Print Error, CV $80) (Image)

1925 1.5p Saudi Arabia (INVERTED Black Overprint, Print Error, CV $80, MNH) (Image)

1925 1.5p Saudi Arabia (INVERTED Overprint, Print Error, CV $300, MNH) (Image)

1925 3p Saudi Arabia (INVERTED Blue Overprint, Print Error, CV $80) (Image)

1925 5p Saudi Arabia (DOUBLE Overprint One INVERTED, Print Error, MNH) (Image)

1962 Saudi Arabia (INVERTED Overprint, Print Error, Full Set, MNH) (Image)

1962 Saudi Arabia, Souvenir Sheet (MISSED Stamp, Print Error, MNH) (Image)

1977 Saudi Arabia, Pairs (Type II, Full Set, CV $100, MNH) (Image)

1979 Comoro Islands (DOUBLE Overprint, Print Error, MNH) (Image)

1980 60f Congo, Airmail (IMPERFORATED, MNH) (Image)

1980 60f Congo, Airmail, Pair (IMPERFORATED, MNH) (Image)

1919 6g Ethiopia (INVERTED Center, Print Error, MNH) (Image)

1931 Ethiopia (DOUBLE Red and Blau Overprints, Print Error) (Image)

1950 25c Ethiopia, Block of Four (Black Overprint instead Red, Print Error, Corner Margins, MNH) (Image)

1950 10c Ethiopia, Block of Four (DOUBLE Overprint, Print Error, MNH) (Image)

1950 25c Ethiopia, Block of Four (DOUBLE Overprint, Print Error, Corner Margins, MNH) (Image)

1950 5c Ethiopia, Block of Four (INVERTED Overprint, Print Error, Corner Margins, MNH) (Image)

1950 10c Ethiopia, Block of Four (INVERTED Overprint, Print Error, Corner Margins, MNH) (Image)

1950 25c Ethiopia, Block of Four (INVERTED Overprint, Print Error, Corner Margins, MNH) (Image)