The bonded messenger's vehicle license tag number is "Mary, Paul, Frank, 6, 8, 6 (MPF686), which is the same tag number used in Gem Robbery (1957).
Henry Wigram was driving a 1957 Ford Custom 300 4 door Sedan. Alma Wigram was driving a reported red colored 1957 Ford Fairlane 500 Sunliner Convertible. Suspect John Grolier drove a light blue two-tone 1957 Plymouth Custom Suburban 4 door Wagon.