All Genuine Forgery A B C D E F G H I J K L M N O P R S T U V W Z Ä Å O Artist Also known as Born/Died Country Frans Wilhelm ODELMARK FWO 1849–1937 Sweden Onni OJA 1909–2004 Finland Erik OLSON EO 1901–1986 Sweden Axel OLSON AO, Ohlson 1899–1986 Sweden Olle OLSSON HAGALUND OOH 1904–1972 Sweden Helmer OSSLUND HOD, Åslund 1866–1938 Sweden