With the 1960 base, trailer numbering started in the TU- series.
Up until TZZ and then from TAA as high as TKC-384 are reflectorized using glass-bead reflectorization.
They have metal tabs where the stickers are attached (the stickers wouldn't stick to the glass-bead reflective plates).
1980 TABc.1967 plate
This plate is an anomaly - it's a TG- series (which should have been issued around 1967, but it has a natural 1960 tab.
The source of this plate said that the tab was original to the plate.
Either way, I wanted to include it here. Dave Zullo
In mid-1970, the reflectorization was changed to Scotchlite somewhere between TKC and TKL and remained until the TNZ series. The tab slots went away at this point as well ... sort of :-)
Another strange plate here ... it has Scotchlite sheeting, and a sticker, BUT ... the metal base has tab slots.
The slots are visible on the front of the plate, but tabs were never used.
STICKERED 1976Dave Zullo
STICKERED 1984Dave Zullo
Starting with the TOA series, reflectorization was dropped.
A possible overlap of serial numbers happened in 1972 or 1973.
The TUC series of trailer plates was issued on the reflectorized base in 1960.
But there were also TUC plates issued on the 1971 (painted) base.
See below - number TUC-502 is from 1960 and TUC-809 is from 1972/73.
Seems like an overlap.
In mid 1972 or early 1973, after the TU- series finished up (or they figured out they'd used it already...),
the TA-100A series started. Some of these received 1973 stickers.
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.