Congrats on the dog tag. Like the others said, If you detect for any amount of time, you will end up with an entire display case ( or 2 ) of those dog tags.
It's not a race to catch up on cool finds mate. Just enjoy the adventure of every day out in nature finding things folks lost and pondering how they got there. You'll be having some real surprises coming your way if you keep after it. Congrats.