With a SN of 520XXX and no prefix (such as D,C or K) it is a .38 Military & Police from around the late 1920's.It's a 6-shot. I see that some folks post the whole serial number and some don't. Would the rest of the number help determine a birth date?
.38 Military & Police postwar.the serial # is S 8680xx
Serial numbers ran from S811120 in 1945 to S999999 in 1948.
The model 12 is the aluminum frame version of the all steel model 10, hence, the name airweight.I just bought a S&W airweight 38 SPLctg under the cylinder it says mod12-3. I thought it was a model 10 but not sure. the serial number is 5D577xx
Serial number dates it to 1979.
Serial CAR91XX = 1996.Model 10-10
Serial CAR91XX
Model 10-5
Serial D3767XX
Serial D3767XX = 1971.
Jim