Cool. :thumbs:
For some reason Hamtramck used up some 1969 broadcast sheet blanks during the 1970 model year, they are fairly common for cars built the first three months or so. They are hard to figure out sometimes.
G51 is most likely H51 - AC. Can you take a close up photo of that part of the sheet? That would help to figure out what G06 may be.
Did you check the other bucket seat too? There may be a sheet in it for a different car.
For 1972 up cars, if there is a broadcast sheet in one of the bucket seats, it is usually in the base, not in the backs.
T/Ake care,
Barry