 During the wartime regional league setup, Rangers achieved their highest score against old firm rivals Celtic with an 8–1 win in the Southern Football League.Scot Symon continued Struth's success, winning six league championships, five Scottish Cups and four League Cups, becoming the second manager to win the domestic treble in 1963–64 season, the era of 'Slim' Jim Baxter, one of the club's greatest players.Rangers also lost by their biggest Old Firm margin of 7–1.