I walked along a small stream with Sam and Ripley over the weekend. As is usual with many suburban streams there was the usual detritus scattered about. We found many old bricks with various manufacturers stamps on them. It became a bit of a game as we sorted through a pile of rocks and bricks near one bend pool.
I noticed the item below wedged between two rocks. Sam guessed its function but didn't realize it was not the type of "stay on can" pull tab that he was used to seeing. The "pull off" tab started to be phased out in the late 70s. No doubt some small stream angler from decades ago discarded it while sampling a fine American lager.