Ernie,

See Jim's response above. Sarco is a retailer. In the past they were an active importer as well. If you take the barrels off you may find some marks. These would be makers and or proof marks. If you can take some pictures and post them, some one should be able to help.

I am no expert regarding N.R. Davis. Hopefuly, some one with much more knowledgable will respond.

Pete