.38 Military & Police Postwar, the Pre-Model 10. Manufactured between 1948 & 1951, serial range for those years was C1 to C223998, starting in April 1948, so 1949 seems likely. Grips are modern after market. The gun appears to be refinished, S&W did not nickel plate the hammer and trigger. If the hammer and trigger are color case hardened, not nickel, then the finish may be original.
From the hammer it appears to be a modern 'short action' gun, the change over from the pre-war 'long action' to short action occurred 1947-1948 as old parts were used up.