My only Martini-Enfield is deeply buried in a blanket chest, so I am unable to make a comparison. It was rescued from a pub wall in Harrogate and has been deactivated in in the most barbaric way - so best hidden from sight..!
A quick calculation of the original diameter of the protector (based on its circumference) gives 18.3 mm, which is a nice snug fit for a M-H. See comparison shot below. What do you reckon?
The height of the "nacelle" is considerably exaggerated due to its flattened state.
Back in 1978 the Ladysmith battlefield enthusiasts certainly believed these to be M-H.
I wonder if the heavier 'cavalry style' hammer makes this Webley a Mk II or Mk III?
I found it interesting to see three different .303s in the background: a Long Lee at the back, a cavalry carbine in front, and a Martini Enfield Mk I on the right.
The past is not dead. In fact, it's not even past.