[5] The records were pressed in Quebec but distributed in USA only, and were Compo's only operations in the United States.

[6] Distribution of Ajax Records in the USA outside of the north-east and north-central part of the nation seems to have been poor.

[12] Although marketed as a race records label, some mainstream material was released, including classical violin solos and pop sides by Arthur Fields and Arthur Hall[9] and some country music.

[13] After Ajax was discontinued in 1925, some of the masters were reissued on the American Pathé label.

Most issues are acoustic, but some late Ajax releases are electrically recorded.