First issue 1952?
used passenger plate colors through 1975
marked "TAXI" vertically 1952-1985; "TX" prefix 1986-present
letter in plate number 1952-1971 referred to the weight class of the taxi. See Weight Codes
by default, Taxi are 'for hire' vehicles. Marked "Common Carrier" with SC abbreviation 1952-1964
issued in pairs 1952-1974