Sorry, don't have the foggiest, from the information given, you have a nickle plated revolver that is chambered in .38 Special ( That's what ctg means, cartridge. It could be a early Hand Ejector Military and Police ( 1902-1905 ) or it could be a Spanish copy. Is it stamped Smith and Wesson, how long is the barrel, how many cartridges does it hold. Are there any letter prefixes or suffixes on the serial number ( a lot of folks don't think they are important), what kind of grips, any logos on the grips. chxwing, a little more information and perhaps someone can help you/ The serial number by it self is not always enough. Post back with as much information you can, write as if you are describing the firearm to a friend. Ron