Need some help identifying a S&W hand ejector revolver. Barrel marked "38 S&W SPECIAL CTG" 4 inch barrel with a 4 screw side plate. It has a mushroom shaped ejector. Serial number on bottom of the rounded handle is 304XXX but on the bottom of the barrel it is prefixed with either a small "R" or a small but not fully stamped "B" then 304XXX. Any ideas of the year and approximate value would be great. I'll try to attach two pics to show the condition.
Thanks,
JHILDE