Hi this is the first ever time I have actually got rather excited about one of my finds, so it hasn't quite "sunk in" I was digging for more poison bottles all day and I get nothing but common boring bottles and as always I find something epic which I believe is a vintage submarine depth metre guage but this is just my wild guess. I hope it is lol I uploaded a pic from google that the dial looks the same, the end bit. Can anyone confirm that it is off a sub? I dug it up quite close to where I found lancaster and naval parts. Also any clue on how I could clean this up without damaging it?