1970 - 1973
Starting with UAA-100 in late 1970, reflectorization stopped and standard painted plates started being issued again.
1970UAA-100 - UBZ-999
It's worth noting that the 1971/1972 plates had problems with the paint on the borders.
Usually, the top and bottom borders lose all or part of their paint, giving the effect of silver bars on the top and bottom of the plates.
1971UCA-100 - VTZ-999
1972VUA-100 - YIZ-999
The "X" series was reserved
for COMMERCIAL plates.
1973January - July
YJA-100 - YZZ-999
Issued on July 12, 1973
This series ended at YZZ-999 in July of 1973.
The Z series was not issued - it was originally reserved (but never actually used) for COMMERCIAL plates.
(We'll see the missing Z series later - on the blue base in 1985.)