I have a 4", .38 special Victory, s/n V494011 with smooth grips marked to the gun. I don't see US markings on the gun and the backstrap is marked WB-S-ESS followed by a markings covered by pitting that appear to be 110.48 with the 48 in a larger font. The matching serial number under the barrel is followed by the letter, P. Can anyone shed some light on what the markings mean?