I have four S&W revolvers to check date of manufacture
#1 S & W model 36-1
.38 cal. nickel plated; 3 inch heavy barrel; round butt, wood grips
5 shot-non recessed cylinder
fixed sights, serial # J872618
#2 S & W model 38 (No dash) airweight, shroulded hammer
.38 cal. nickel plated; 1 3/4 inch barrel; round butt, wood grips
5 shot- non recessed cylinder
fixed sights; serial #ACU4189
#3 S & W model 19-3, .357 magnum, blue
4 inch barrel (pinned); square butt with Goncalo Alves wood grips
6 shot recessed cylinder
adjustable sights; serial #7K64445
#4 S & W model 686 (no dash), stainless steel
6 inch barrel (non-pinned); square butt with Goncalo Alves grips
6 shot non-recessed cylinder
adjustable sights; serial #ACU9932
Thanks in advance for your help!