Good catch, AD. They didn't officially call them First and Second series like they did with the 55s, but there was an "early" 47 model (basically a 46) and a "late" 47 (which was an AD).
Jeff Nelson
"Beer is proof that God loves us and wants us to be happy." - Benjamin Franklin "Always do right. This will gratify some people and astonish the rest." - Mark Twain