In mid 1972 or early 1973, the TA-100A series started.

In the early 1970s, NJ started offering the option to renew trailer registrations for 4 years.
This caused some variations in sticker years which are usually evident by the number sequence.
The plates below have 4-year expiration stickers.

The blue plates started at 100-TAA in 1980. The first sticker year for these plates was 1981.

When 999-TZZ was reached, a new series started at T100-AA.

The plates below were issued with 4-year stickers.

The last trailer plate issued on the blue base was T999-VZ.