If you search union switch and signal (a WWII 1911a1 producer from PA) on gunbroker, you will find a Colt 1911 (WWI) frame with the US&S slide. What a shame. US&S 1911s are scarce toda.y IIRC a bunch of US&S slides came out into the market some time ago. US&S was 2nd to Singer for lowest production of the 1911a1.
Winchester 73, the TFL user that won the west