In 1929, the Green Bay Packers won the NFL championship with a record of 12 wins, 0 losses and 1 tie.
Ties did not count in the standings at the time, making the Packers (arguably) the first team to have a "perfect" record, some 43 years prior to the so-called "first" undefeated team, the Miami Dolphins.
In the tie game, does anyone know what the final score was?