i have one that is about 2" in diameter. it has 2 crossed cannons & an anchor with csn below them. i think it is made of bronze. on the back , it says higginbottom / billips & co , in two lines , with a 5 point star below. i believe it is a 1960's reproduction. if it is real , it would be worth $500 to $1000 , maybe more.