For djcrackshot - you might be interested to learn when the revolver was returned to the factory. Remove the grips and on the frame flats under the grips should be a set of three numbers, something like 4 47. This gives you the month and year of service.

For moms38ctg - Welcome to the Forum. You have arrived at the best forum on the net. This is the definitive place to find out everything you want to know about S&W, plus a few things you don't want to know. Be warned that this site is habit forming and may cost you a great deal of money over the years in the collecting of classic S&Ws.

Another 38 M&P, 3rd Model (1905) with serial number 582xxx was shipped February, 1928, but the factory did not ship guns in order, so I would say 1927-1930 range. You can obtain a detailed history on the model and specifics about your revolver from our Historian, Roy Jinks. Value is dependent on originality and condition, so range is wide, maybe from $200 to $1000.