1950:

• "TEXAS-50" at top.
  "Machinery" plates introduced.
• Passenger plate color: yellow on black

• "TEXAS-51" at top.
• Passenger plate color: black on yellow-orange.

• "TEXAS 52" (no dash) at top, through 1960.
• Plates begin having slots for renewable date tabs. No tabs were ever issued, but the slots were not discontinued until 1960. 
• Higher numbered plates are of a smaller size, which continued to 1955.
• Passenger plate color: yellow on black.

• Motor scooter plates (like motorcycle but smaller) issued, possibly for this year only.
• Passenger plate color: black on yellow-orange.

1954:

• Amateur Radio plates introduced.
• Passenger plate color: yellow on black.

• Legislation is introduced to add the slogan, "Tremendous Texas" to 1956 plates. The bill is rejected.
• Replacement plates for truck, truck tractor, and trailer are black on green (odd yrs.) or black on red (even years) until 1962.  Alternate color replacement plates exist into the 70's.
• New plate colors are experimented with. Prototypes exist in at least 20 different color combinations.
• Plates late in the year (after from RA to RF) were of the longer 1956 size & design.
• Passenger plate color: black on yellow-orange.

• Texas adopts the 6" x 12" standard plate size recommended by the American Association of Motor Vehicle Administrators.
• Use of the "stacked" prefix ends.
• "Consular Official" plates introduced.
• Passenger plate color: yellow on black.

• After extensive study, the black & white color scheme is adopted.
• Plates also again feature a lone star in mid-registration (continued until 1976, except, oddly, for 1965).
• The 2-letter prefix uses thinner dies.
• Passenger plate color: black on white.

1958:

• Passenger plate color: white on black.

1959:

• Passenger plate color: black on white.