Great gift idea for a geo-mate who has made it to the 400 geocache hides milestone. Or keep if for yourself. Finished in hard enamel and polished black Nickel - the coin itself measures about 4.5cm across.  Comes with a matchng pin for your to wear with pride, or leave as swag in cache somewhere! Comes with a blank area on the reverse so that you can have it engraved with the cacher's geo-name. Great for birthday or xmas. Fully trackable on Geocaching.com with it's own page of course - but I bet you don't send yours out into the wild. I wouldn't :-)