To meet all of the requirements in a PRODUCTION 1911, the gun has to:
1. Be series 70 (traditional)
2. Have fixed sights (traditional)
3. Have a barrel bushing (traditional)
4. Not have an extended beaver tail (traditional)
5. Spur hammer. (traditional)
6. Have a steel frame / slide with a blued finish (traditional)
7. Be .45 caliber (traditional)
8. Have a 5-inch barrel / slide (traditional)
9. Single left-side safety lever. (traditional)
10. Standard grip safety without bump. (traditional)
It seems rather obvious that the most traditional production 1911 from an American manufacturer would be the Colt Series 70 Model O1970A1CS. It has all of the traditional features listed, and is made by the original 1911 manufacturer.
I would submit to you that the CZ 1911A1 should be considered in this category. It is made in the USA, by a company with substantial US-based operation/roots (however, I think their ownership is concentrated in Czech Republic).
Going down your (nice) list:
1. Be series 70 (traditional) - YES
2. Have fixed sights (traditional) - MAYBE (GI-style, but dovetailed front and rear is a minor but important upgrade)
3. Have a barrel bushing (traditional) - YES
4. Not have an extended beaver tail (traditional) - YES
5. Spur hammer. (traditional) - YES
6. Have a steel frame / slide with a blued finish (traditional) - YES
7. Be .45 caliber (traditional) - YES
8. Have a 5-inch barrel / slide (traditional) - YES
9. Single left-side safety lever. (traditional) - YES
10. Standard grip safety without bump. (traditional) - YES
So I would echo Limnophile in saying that this new CZ 1911A1 is a serious contender for best American production 1911.
I just so happen to have ordered one that will be delivered this weekend (my first 1911!), and will follow this up with a review.
I ordered blind on the strength of my CZ PCR.