another in a series of disappearing signs....
in 1973, the first of the multi year (5-year) license plates was issued.
until then, plates were issued for one year, then replaced.
after the five years, the year 1973 was removed and by 1982,
the KEEP IT BEAUTIFUL was replaced with a new slogan YOURS TO DISCOVER
these plates are still valid as long as they are renewed by the same owner