Two very nice 45's ,
I do find the double diamond walnut grips on the first one a little odd though should they not have been phased out by that year and have the standard grips like the one shown on the second 45 ?
Unless I am mistaken the second 45 with serial number 1997414 was manufactured for Colt by Remington Rand and dates from 1944.
A little tid bit of interesting information regarding the discoloration of the slider and muzzle end that is very noticeable on the second 45 Beginning in 1940, the slideís muzzle end was hardened after the finish was applied but a color mis-match was suppose to be rejected.
From 1942 to 1945 all 1911A1 pistols should show a slight to very noticed mismatch of coloring on the muzzle end of slide, and from 1943 the slide lock notch area should also show some discoloration from hardening after the pistolís finish was applied.
Regards Mark K