We have a .38 special s & w ctg that we'd like to know the approximate age. The serial # is ID97265, the S & W trademark is on the right side, it has a 3 1/2" barrel, 6 chambers, no patent #'s stamped on the top of the barrel, fixed sights, 64-3, and when the cylinder is swung out 53206 is visible on the part that holds the ejection rod.