Thanks Gary, hope you get a deer and would appreciate any info you might find out.
Someone on another forum suggested pulling it apart, the McGowen barrel may be dated on the underside, I'm a little leery of doing that as the inletting is so tight I'm afraid of doing damage.
Terry, it might be earlier, going by what was relayed by the shop and that could be wrong.
Eightbore, thanks for the info on Woodwardsville, I had never heard of it and I've lived in MD most of my life, shop was in AA county,same as the town.