Hi Mike, the two tone magazine is correct and what this pistol would have been issued with at time of production. The late WWI style two-tone magazines were actually used up until mid 1943 (Clawson's third edition, page 84). Colt was so desperate for magazines that in late 1942 they even converted the available Government model magazine for military use, by parkerizing the bottoms and re-bluing them. Following the WWI style magazines were early full blued magazines that still retained the pinned bases. In Canada, we mostly only see the late style full blue welded base mags with WWII M1911A1's. The Clawson third edition book covers the different WWI and WWII magazines in great detail.
-Steve