My 442-1 Pro Series (no lock) frame serial number is CNX96XX, shipped from Smith and Wesson on 30 June 2010. Its got the "hook" and different barrel labeling then your new barrel Sonny. Right side of the barrel is clean/unmarked. Didn't take any pictures of under the barrel however, or notice the date on the fired case (sitting in the safe some 7300 miles from me).
CD