Liberty Cab
Montgomery, Alabama

Maker: Unknown  (Ebay: Realm of Miniatures)

This image of a 1930s grill with a "day and night" motif is another frequently-used image

Union Cab
Anchorage, Alaska

Maker: Diamond Match Co. Chico CA  (Matchcover Collector: Taxi & Cabs)

Alaska's Digital Archives has a 1953 photo of a Union Cab sign with the same phone number. Oddly, the cab at right has only two doors.