So I have a 1945 dated 'X' block BSA No4MkI(T) which has a barrel issue due to poor storage.

It has an beech F56 dated forend fitted and numbered to it with what appears to be "M over 16" as a fitters? Marking.

There is a non-serrated cocking piece fitted which appears to be original to the matching bolt.

It also has a solid, non-split front sight block fitted, also appearing original to the gun.

I'm puzzled why the cocking piece wasn't replaced when the forend was?
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