Alabama started using validation
decals for the 1978 expiration year. In 78 and 79 only, they issued
different color decals for passenger and truck plates. They also
issued a third color decal these two years but I've yet to determine their
use. They also went to the added trouble to print "Sample" stickers,
one would assume to prevent people from buying sample plates and robbing the
sticker to keep from having to pay the registration fees.
Click on the thumbnails below for a
larger high-quality photo.