This listing is for a RARE United States Navy Smith and Wesson S&W. 357 Magnum Pistol Law Enforcement Chief Petty Officer Challenge Coin. This is an amazing piece. This coin is about 4 1/2 in length. It is about 1/2 thick and weighs 6.9 oz. The cylinder spins freely. This will make a nice addition to any collection, a real center piece. Any questions, please feel free to ask. I always strive to deliver prompt and accurate results. If you are dissatisfied for any reason, please let me know and I will do my best to resolve the issue to your satisfaction. Just add the items to your cart and request an invoice. Master at Arms MA. Naval Security Force NSF. Auxiliary Security Force ASF. Chief Master at Arms. Navy Special Warfare NSW. Navy Special Operations NSO.