“...Ooops! That was a Colt 1905, damned fat fingers.” [muir_redwoods, post 22 added to added to post 13]
Disassembly of the slide from the frame for Colt’s M1905 is the same as that for M1900, M1902 Sporting & Military, and M1903 Pocket Hammer.
With the slide all the way forward, push backwards on the recoil spring retainer at the muzzle. When it is sufficiently depressed, the slide retaining key (flat piece at bottom edge of slide, about 1/2 inch back from muzzle) if freed and may be pressed out from right to left. This frees the slide and it may be removed backwards off the frame rails.
The barrel remains pinned to the frame and the recoil spring remains captive in its frame tunnel. Further disassembly isn’t required for cleaning, and is pretty much impossible anyway, without tools.