Viewers, I bought this 320 RR 30 years ago at the Tulsa gun show. It has been in the safe ever since. I have never tore the gun down, just oiled it a few times. I have never deep cleaned the gun. Upon a fairly thorough inspection, I find the following: Ser. # on backside of cylinder is 83. Under wood of stock, stamped in steel is 582. Top of barrel, app. 3" behind rear sight is # 144. Right grip bottom has been chipped and filled, found that today. Top of barrel in front of rear sight is: Smith&Wesson Springfield, Mass USA Pat'd July 17 & 24 65. July 11 65
On the left frame under cylinder appears an English/British crown, then initials P N, then a rearing lion or bull. This rearing animal also appears on left side of barrel, app. 1" in front of cyl., and also on the cylinder.
Thanks warren