Sprite bottle but what year?

I'm trying to figure out how old this sprite bottle is that I found buried in my backyard. My house was built in early 80s.
34 is on the bottom of the bottle
W 0 84 W6 is located near the bottom side of bottle. It looks like an I or 1 is located inside the 0 but I can't tell for sure. There was a little paper in the mud that belonged to the bottle. Any help appreciated.