This arrived for inspection
Internals
Cocking slot

Broken shoe removed leaving little or no damage.
The "dimples" in the piston cocking slot look factory fresh and seen them before. They irritate me and tempted to flatten them but do they have a purpose? Very uniform and too widely spaced to be bearing points for the shoe methinks.
Piston sleeve is very well made and sprung into the body. Think it will redress and refit.

Oh and it's a .. ?