>>64163655
Could he be confusing it with something like a Colt New Service? That'd be a DA/SA hand-ejector revolver which was made in calibers like .45 'Long' Colt
Later you would have the M1917 pattern, where both Colt and Smith & Wesson adapted their commercial large frame revolvers for .45 Auto (and clips), to fill gaps in military sidearm procurement (not enough 1911s fast enough). I could imagine some of those making it across the ocean and staying in Britain, maybe or maybe not converted to one of the British large bore revolver cartridges like .455 Webley or .455 Eley
Flemming was not much of a gun guy, and I could see it being the kind of error he'd make, and the moniker of .45 'Long' Colt came about because normalfags not much into guns needed a clearer differentiation between the .45 Colt revolver cartridge and the Colt 1911 in .45 caliber, which sometimes get referred to as a ".45 Colt"
Also, man you guys, I haven't watched the 007 movies in so damn long, really, haven't had much time to watch movies at all, I'm missing it.