Pretty sure it is actually a Mk I. Firstly, it has to be either a Mk I or a Mk II as there is no cylinder cam under the holster guide like there is on the Mk III onwards. Secondly, if you look at the top of the back of the grip you can see that it is slightly spurred, which is one of the distinguishing features of the Mk I:Error creating thumbnail: File missingWebley Mk I - .455 WebleyIt looks like it also has the thinner hammer of the Mk I rather than the Mk II, but it is hard to tell for sure from this angle. --commando552 (talk) 06:34, 13 September 2014 (EDT)