Attached Link: Here is a nice image of an American (USAAC) Boeing P-12C fighter from the 1930's.

And for history buffs interested in swastika uses ... swastika has also been used in Finland (where I live) from the Iron Age to this day. Some swastika uses in Finland: -Nurses' Union of Finland (early use) -Lotta Svard movement (volunteer-based defense organisation that was banned after the WWII) used it since 1921 -Finnish Presidential flag still has it -Finnish Air Force has been using swastika since 1918 and still continue to use it. It's in the flags, emblems, heraldry, medals ... As the Nazi used swastika in a tilted position, the uses in Finland have never had that tilting.