Fede iam inclined to aggree.the two examples you show are similar and the name is the same . the second photo shows a rifle descibed elswere as the kretz rifle useing a coil spring in the but hooked to a chain that operates the bolt.
Agreed Fede. This was based on the Pattern ’13 rifle in .276 inch calibre. It was part of the British semi-auto rifle trials that took place 1909-1914.
I have the weapon drawings and photographs. It has a blow forward gas trap at the muzzle like a Bang.
An example exists in the Imperial War Museum collection in London.
I should have said in my previous post that the calibre was not .276 inch Pederson as mentioned by Fede but .276 inch Enfield, a much larger and more powerful round intended for the Pattern ’13 rifle. The Pederson had not been developed at the time this rifle was made.