VARIATIONS

1906:  Type 1 - Narrow medium slots       1 - 10909

       Type 2 - Wide long slots       11004 - 14082       (3,079 P)

1906-09:  1-2-digits have legends at right, not at top.

          Plates on "wrong" size base are replacements.

1908:  Small stamp 12, 28, 66, 371, large stamp 347, 524, 605, 1017+,

       no stamp 185, 719, 848.

1911:  Type 1 - Flat edges                1 - 30936

       Type 2 - Bevelled edges        31022 - 44272      (13,251 P)

               (#30000 issued by 5/6/1911, #32000 issued 5/15/1911)

1912:  Type 1 - Sunken numbers, reverse stamp in box

                                          1 - 40814

       Type 2 - Raised numbers, plain reverse stamp

                                      40893 - 59406      (18,514 P)

               (#40000 issued 4/27/1912; #41144 issued 5/11/1912)

                Small   "RIDGE AVE."      40893 - 51060,

                Rounded "1035 RIDGE AVE." 51472 - 52705, 55322 - 57597

                Squared "1035 RIDGE AVE." 52863 - 54849, 58142 - 59406

1913:  Pairs, both new plates - 1901, 3840, 4429, 4837, 6334, 8588, 8700, 8912,

                                9243, 10541, 12375, 12981, 15754, 18282, 28462

       Pairs, one refired over 1912, other new plate - 9845 (over 2845),

                                                       13713, 14738

       Singles seen, refired over 1912 - 9497, 9517 (over 2517), 14494,

                                         14912, 18596

1915:  Type 1 - Raised numbers, "PENNA"       1 -  19999,

                                          30000 -  50253,

                                          53206 -  56566,

                                         58390 - 

                                          66026 -  66766,

                                          68054 -  68873,

                                         100160 - 163730

                                         167673 -       (108,747 P)

       Type 2 - Sunken numbers, "PENNA."  51102 -  52679,

                                          56709 -  65998,

                                          67248 -  67980,

                                          69071 -  99954 (42,485 P)

1915:  Back stamp is black/white, blue/white, white/blue, or absent.

1915:  72025 Comm. size base Type 1, 71854, 72070 normal size Type 2.

1916-19:  Keystone tab only for transfers.

1917:  Squared "2"          20 - 3062, 5427,         21988, 22641,          32880 - 271064

       Sloping "2"        3852,  6261, 9629 - 19642, 22489, 23050 - 29940, 273730 - 302439

       One of each (pair) 2602,  4922

1920:  Round or square "0" of date.

1923:  Type 1 - 16", slots inset  [100-000]-  870-247

       Type 2 - 15", slots corner  883-073 -  989-997 (106,925 P)

       Left edge trimmed, no rim 112-378; 111-231, 112-674 normal

      (also Comm. seen)

1924:  Type 1 - No slots                  3 -      9917

                                      33468 -     99433

                                    579-028 -   587-032

                                    592-456 - 1-000-000

                                      A-218 -   A-48195 (539,409 P)

       Type 2 - 2 top slots           11957 -     32350

                                    100-003 -   575-096

                                    588-638 -   592-269 (499,120 P)

1925:  Type 1 - Wide 1925 dies           1 -   A98-221

       Type 2 - Smaller 1926 dies   B3-280 -   B66-142  (62,863 P)

1926:  A333, A812 no hyphen, 6" x 10"; B-387 hyphen, 6" x 12",

       C-21 hyphen, 6" x 10".

       C1384 no hyphen; B2-469, B7-226, C4-711, C5-777 hyphen,

       all same size.

1927:  4-digits have round date, 5-digits have square date.

1933:  Type 1 - "PENNA 1933"

                Short size - C145, C345, D42, F67, F301, H244, H245, H882,

                             J919, K42, K468, L15, M242, M692, M714, P169,

                             R985, Y875, 7A85, 1B, 3B71, 1H69, 8H16, 4K1

                Long size - see below (61359 reported)

       Type 2 - "1933 PENNA" (135,000 reportedly manufactured)

                Short size - none seen

                Long size - see below (61714, 86297, S7242 reported)

60469, 60720, 63406, 63673, 64356, 65733, 66287, 67338

71745, 72421, 74049, 74297, 76323, 76337, 76738, 76775, 77030, 77728, 77959, 78703

80802, 80932, 81605, 82974, 84098, 84744, 85427, 86709, 87612

91406, 91990, 92018, 92435, 93160, 94104, 94999, 98197, 98591, 98915, 99212

A1438, A1829, A2063, A3021, A4853, A5923, A8039, A8148, A9144, A9401

B3738, B9157

C2205, C2326, C2824, C2825, C3698, C3830, C5262, C6973, C8029, C8879, C9472, C9840, C9923, C9965

D4270, D4624, D5532, D6116, D7343, D7492, D7742, D8100, D8291, D8798

E1221, E1386, E2455, E2512, E2895, E3174, E5943, E8710, E9313

F3156, F4308, F4772, F5578, F5682, F5978

G1644, G1975, G2099, G2966, G3861, G4423, G4832, G5676, G6948

H1057, H4286, H4631, H4897, H6003, H7224, H8333, H8354, H9814, H9850, H9910

J1022, J2802, J3130, J6767, J7750, J8647, J8907, J9232

K6189, K7058, K8941, K8945

L5545, L6558, L7950, L8374, L8620, L8645, L8932

M1524, M1794, M3038, M4027, M4029, M4310, M7564, M8529, M8894

N1356, N3202, N3276, N3732, N4016, N5595, N5914, N5975, N6246, N6388, N7677

P2125, P4488, P5598, P6573, P6622, P7662, P7993, P8720

R1071, R1621, R2498, R2580, R3355, R3442, R5759, R6829, R8364, R8885

S1070, S3828, S3976, S6234, S6263, S6450, S7267, S8597, S8570, S8648

U2474, U4741, U5082, U5220, U5804, U5805, U6044, U6604, U9317, U9515, U9648, U9781

V1316, V1323, V1388, V3819, V4212, V5586, V5590, V5955, V6506, V8922

Y1468, Y3679, Y5590, Y5857, Y6694, Y7058, Y7810, Y8578

Z2027, Z2117, Z2229, Z2292, Z3514, Z3875, Z3876, Z6428, Z7199, Z9577, Z9912

1A151, 1A434, 2A299, 2A850, 3A302, 3A779, 4A400, 4A651, 7A134, 7A504, 8A060, 9A011

(B?)

1C948, 3C500, 4C288, 4C929, 6C354, 7C125, 8C019

5D963, 6D007, 8D193

3E568

3F598, 5F862

1G984, 2G570, 2G571, 8G066

2H190, 5H037, 6H189, 8H849, 9H810

5J133

(K?)

6L820, 7L126

2M559, 4M267, 5M200

1937:  Type 1 - No keystones      10001 - 5MC89       (1,700,359 P)

       Type 2 - 2 keystones       9MG55 - 2PB08          (33,704 P)

                            (No 4-figure plates? 8LN5 highest seen)

       Type 1a                    9PF72 - 4PV52          (11,361 P)

1942:  "EXP." or "EXP"      (10AA0 format appeared in 1943)

1952:  Type 1 - 11" length         1001 - 7ZZ90       (1,884,790 S)

       Type 2 - 10 1/4" length    96AA0 - N192B         (980,233 S)

1954-55:  Wide or narrow "Erie" triangle.

1955:  SA12 - SA96 are partially reflective, RS201, SL2 normal.

1956:  Type 1 - 1937-56 dies, straight botom edge

                                   1001 - J9Z79       (3,244,979 S)

       Type 2 - 1957 dies, indents for 2 lower holes

                                  K6C16 - P9Z99          (97,384 S)

              (WT seen; verify TT) AT10 - ZT999          (20,790 S)

              (Verify TW, WW)      AW10 - ZW999          (19,800 S)

              (Verify TT, WT)      1AT0 - 4YT99          (18,310 S)

                                   1AW0 - 8MW81          (11,762 S)

                                                  (TOTAL 168,046 S)

1957: Type 1 - 1957 wide dies, indents for 2 lower holes

                                   1001 - 999ZZ       (2,684,999 S)

      Type 2 - 1957 thin dies, straight bottom edge

                                 100000 - 799279        (699,280 S)

      Type 3 - 1958-70 dies, straight bottom edge

                                 802945 - 883083         (80,139 S)

1958:  609-148, 618-388 aluminum, 612-402 steel?

1959-76 Stickers:  Serial number for renewals,

                   PA0000 for new registrations.

1982 Stickers:  "JAN" to "AUG" have old design, "9-82" to "12-82"

                have new design.

1991 Stickers:  Modern font (7-91) or traditional font (8-91).

1993 Type 3: AXN-1346 has hyphen, AXK-6844, AXN-2208 have keystone.