VARIATIONS

1912-13:  3-digits have dash suffix.

1915-16:  2-digit has no dashes. (Verify 1914, 1917)

1916-17:  1-digit flanked by dashes. (Verify 1914-15)

1917:     5-digit has thinner dies.

1918:     No dashes used.

          Type 1 - Square dies     1 -  7141

                               13462, 13779

          Type 2 - Round dies  13036, 13615,

                               14118 - 18994  (4,882)

1919:     1-2-digits flanked by dashes.

          5-digit has thinner dies.

1925:     "FRONT" or "REAR" marked.

1932-46:  1-3-digits flanked by two sun symbols.

1947:     Serif "1" all plates, including 11-595.

          Non-serif "1" in prefix 11-3229 - 11-3243.

1948:     Serif "1" in prefix.

         (Counties 1, 10, 13-2692 - 13-2704, 16-1914, 21, 31)

          Non-serif "1" in prefix.  (Verify County 14)

         (Counties 11, 12, 13-1371 - 13-2107, 15-165, 16-592, 17-1657,

          18, 19)

          Non-serif "1" in serial. (26-1095 only one seen)

1949:     Most are waffle aluminum.

          Some plates reportedly smooth aluminum.

1950:     Early issues smooth aluminum.     (11-405)

          Most are steel.                   (1-11010, 2-40832)

          Late issues steel with 1951 dies. (1-11816 - 1-11870, 2-42840)

1951:     Most have 4 inner bolt holes.

         (4-7997, 6-3653, 8-2994, 16-186, 21-1767, 30-400, 32-1272)

          Late issues have 4 corner holes and 4 long bolt slots.

         (4-9146 - 4-11956, 6-9261 - 6-11929, 8-5430 - 8-5917,

          15-3147, 16-2667, 18-2066, 21-2104, 23-1198,

          30-853 - 30-879, 32-3396 - 32-3860 = 6,464 P)

1952:     Most have inner bolt holes.  (2-49097, 7-9734)

          Late issues have corner bolt holes.  (7-10011 - 7-10466)

          Late issues have 1953 dies.          (2-50010 - 2-50907)

1953-57:  Trucks have reverse colors, unmarked.

1957:  Period news articles mention stacked plates with new dies

       for counties 15, 16 and 17.  These may be the 1958 dies.

       15-7131, 17-2210 normal; 1/6-10118 has 1958 dies, no left

       "57", and slogan at far right, not centered.

1957:  Type 1 - 1953-56 dies 2-69993, 6-13919, 15-7131, 16-9162,

                             all other counties

       Type 2 - 1958-75 dies 2-70162 - 2-74753, 6-27908,

                             1/5-7548 - 1/5-8427

                             1/6-10118 - 1/6-12279     (6,814 P)

1958-71:  Trucks have reverse or different colors, unmarked.

1958-71:  Counties 10-32 have slogan at far right, not centered.

1958-60, 1969-71 Type 2a:  Counties 1-9 have "19" of date,

                           counties 10-32 have no "19" of date.

1959-60:  Red or maroon.

1963 STICKER:  Non-reflective paper or reflective plastic.

1965-71 Type 1a:  Counties 1-9 have embossed "65" in LL corner.

                                                     (405,397 S)

        Type 1b:  Counties 10-32 have pre-applied 1" x 1 1/2"

                 "65" sticker in LR corner.          (166,256 S)

1969-71 Type 2a:  Counties 1-9 have embossed "19" in LL corner.

                                                      (20,272 S)

        Type 2b:  Counties 1-9 have nothing in LL corner.

                                                     (131,069 S)

1961-71:  2-A-1 - 2-L-999 have hyphen on 1-3-digits after

          letter, 2- M1 - 2- Y999 have no hyphen.

1971:     2X-3603 - 2X-3671 have letter before zia;

          2-X6021 - 2-X6293 have "71" in LL corner;

          2-Y6510 - 2-Y7427 have double-stamped zia error.

         (2-X 161, 2-X5223, 2-X9142 - 2-Y3781, 2-Y8560 normal)

1961-64 BASE

1961 Type 1 - Reflective, heavy galvanized steel ('61)

                          or light plain steel ('64)

1962 Type 2 - Non-reflective, light plain steel, painted back

1965-71 BASE

1965 Type 1 - "NEW MEXICO", heavy galvanized steel ('65)

                            or light plain steel ('67)

1969 Type 2 - "NEW MEXICO USA", heavy galvanized steel

                            or light plain steel