Thanks for the info about the Coke D manufacturing date, which indicates the bottle I pulled off the bottom of the lake is from 1943. My wife told me that, "Just because a beer bottle has been underwater for fifty years doesn't mean it deserves a place on the mantle," but 80 years!!!! Now...
I often snorkel in our small lake, looking for more broken glass after finding enough of it near my dock and on the shore: frightening! We're on a lee shore, and underwater it's sandy in the places where there are not just rocks. Underwater visibility is much better after a couple of days of...