Atlanta acquired rights to Mike Farmer from Royals (date approximate) in exchange for cash.
Cincinnati sold Mike Farmer's player rights to the Hawks for cash in August 1961. The exact day is not preserved in Basketball-Reference, which lists the move as August with an unknown date, so the archive's August 1 route should be treated as approximate rather than exact.
Farmer did not join St. Louis immediately. He played in the American Basketball League during 1961-62, meaning the rights purchase produced no NBA service in its first season. The delay is important context, but it did not erase the Hawks' control of his NBA rights.
Farmer returned to the NBA with the Hawks in 1962-63 and played all 80 games, averaging 7.4 points and 4.6 rebounds. He followed with 76 games in 1963-64 and 60 more in 1964-65. The delayed acquisition ultimately produced 216 regular-season games for St. Louis.
Cincinnati's cash amount is unknown, so the Royals' return cannot be priced. St. Louis nevertheless turned that payment into three seasons of rotation service after waiting through Farmer's ABL year. The result favors the Hawks modestly while preserving the date and price limitations.
Even Trade — St. Louis C, Cincinnati C. Farmer eventually supplied 216 Hawks games, but the sale price and exact August 1961 date remain unknown.