Dick:
Yes indeed this question has been posed to Jim Stubbendieck, and also to barrel stamp expert Drew House; we remain stumped at this pont, which is why I thought it appropriate to pose the question to the double gun community on this forum.
James
Thanks for the additional info on Northern Commercial. As to the gun being researched, the LC shipping records note thie gun as being shipped to Northern Commercial, but do not record city or territory destination. Interestingly the gun was returned to the factory two weeks after being shipped to Great Northern; then was shipped in conjunction with another other of guns, final destination not recorded. The factory commenced building this gun 10 days after the bombing of Pearl Harbor, can't help wondering if the stamp in question may have patriotic significance? Again, all help is appreciated.
Tom