It was converted to a .22RF way back when.
When I converted it to a .303 I thought I would have to change the breech block to centrefire.
I compared breech blocks with a .303 Artillery Carbine I had and they were the same.
Investigating further showed the lever lugs inside had been altered so the BB did not come up so far.
This allowed the firing pin to hit the rim of the RF.
I bought another lever at a gunshow but it still slots into the socket in the butt the same.
The butt and forend wood show the same checkering so must have been done at the same time. Even though the butt is broken I want to keep it as is.
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For the Kiwis, it is stamped W. H. Tisdalls, Christchurch.
This is or was a Gun Dealer there.
Keith