Your revolver almost certainly shipped before 1925. I have kept records on K frame boxes and put together a short study a few years ago on how to age these boxes. Best estimates of style changes are the two photos I am attaching below. This information was obtained from many examples that show up for sale and on this Forum. The Standard Catalog of Smith & Wesson, 4th Edition has similar information, but in a slightly more generalized fashion.
One has to realize that there would have been a transition period on both ends of a particular style production, since leftover boxes were certainly used until gone along side of the newer designs. Early labels used a color coded label for different barrel lengths, finished, and/or calibers, but I believe by the 1920s that practice was mostly gone.
There were two different inner labels for the first style box. One ran from 1899 to 1902 and carried a inner lid label for the First Model. The second style label contained instructions for opening a revolver using the thumb latch. The black box was used until around 1925 and contained a dual language instruction label.
This was often called the patent or clamshell box. It was the first box to have a patent date printed on the inner label, December 28, 1920. The box did not show up on K frames until the mid-1920s, with the earliest box I have found having been shipped in 1925.
serial number check
Linear Mode
