The US&S M1911a1 is one of the most rare in existence. I think only the Singer pistols are fewer in number.
Do you have the original grips?
"The Switch" is still in business in Pittsburgh, PA, a subsidiary now of an Italian company recently purchased by Hitachi. They make railroad signaling systems. I have a friend that works there...
http://www.ansaldo-sts.com/en/index
I guess it's full circle that a Japanese company would own the company that made the M1911a1 pistols we used to win WW-II...
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Igitur si vis pacem, para bellum -
- Therefore if you want peace, prepare for war.