My cousin was flooded by Harvey and has asked me to store and sell as I can, a bunch of guns. One of them is a Smith and Wesson revolver. Inside the frame is stamped "5921-6" On the barrel is stamped "38 S&W Special CTG". I can't find anything about this gun - value? or even caliber (38 S&W or 38 SPL). Any help on this matter would be appreciated.