>>93823What the Colt Double Eagle reminds me a lot about is these double-action conversions of 1911s which Seecamp made, where a hinging trigger piece is added inside the trigger-guard (which was usually altered to be larger), and then a section was milled out on the right side of the frame, where among other things a connecting bar would let the new trigger cock the hammer (essentially being a cocking lever), and if the new trigger was pulled back further, it would hit the normal single-action trigger (which is still there) and the hammer would drop.
In practice, this creates a double-action/single-action pistol out of a 1911, as a kind of clever bit of hacking. I don't know if Colt ever saw these conversions, and I don't know when Seecamp made them, but it feels like they could have seen these, and figured they could make pistols like these themselves at their factory, only taking some shortcuts.