thanks included a photo of the whole rifle if that helps?
looked up the m1917 Enfield and think you're correct that this is the action of the Whitworth shown above.
The cut out used for the bolt handle seems the same in the stocks that carry the Enfield and the safety looks the same.
from what i read previous they spoke of using Yugoslavian mausers and saw a few Whitworths with those actions.
this auction link shown below is from what i can tell for the exact same rifle.
whitworth
