In the past I have spoken to the importance of looking for the Union Switch and Signal label when purchasing your next M3 switch machine. However, you might also consider looking for the US&S logo when in the market for a M1911A1 .45 caliber handgun. Not only was US&S one of several non-traditional manufacturing concerns drafted into weapons production during World War 2, they were one of the few to affix their corporate trademark to the finished product. Recently Ian at Forgotten Weapons finally got around to covering the US&S M1911 in what might be his only firearm/railfan crossover video
Although they ended up being the second smallest manufacturer of M1911A1 pistols during WW2, this still amounted to over 55,000 units. Anyone familiar with the parts and pieces in a Model 14 interlocking machine can see that making firearms components would be in their wheelhouse. It's unfortunate that Hitatchi has been sidelining the US&S brand after their takeover of the previous parent, Ansaldo.