These plates were used on heavy trucks - mostly construction dump trucks - in the 60s and 70s.
They are no longer issued.
1960-1978100 (?) - 20000 (?)
Annual issues stopped in 1962 and were replaced by plates with tab slots.
Looks like the numbers reset and started again at number 100.
1978"C" stickerLee Madigan
The tab slots went away sometime in the 70's, between 6668 and 10470.
1980COMMERCIAL with C sticker
I saw and photographed this plate in use on a heavy dump truck - is this an error or a revival of CONSTRUCTOR plates ?