Tractor

1960

Tractor plates were issued in TR-0000, TR-A000, TRA-000 and 0000-TA format on the straw base. This was the only year on the straw base with an embossed date.

1971

This one has slots for a metal date tab, but they were never used for this type.

c. 1970, reflectorized

This is part of the experimental reflective sheeting test of the 1970's.

c. 1979 sample

c. 1988

Same format as the straw base.
c. 2000, first-generation Avery sheeting

This sample doesn't make very much sense for the graphic base, but it does resemble a previously-issued series.
c. 1997, first-generation Avery sheeting

This plate is a continuation of the older format. Tractor plates were briefly issued in the 00000TA format first, but I don't have one yet.