The 9mm drill with the white metal case seems only to have been made in 1963, and is a variant of the D Mark I.
Australian D Mark Is come in a variety of types, some with holes and wood distance pieces, early WW2 ones were tinned, etc.
Regards
TonyE
The 9mm drill with the white metal case seems only to have been made in 1963, and is a variant of the D Mark I. A similar round but with a brass insted of a white metal case was made afterwards and then they switched to the chromed fluted type which was the Drill F.2. This is identical to the British D Mark 2.
Australian D Mark Is come in a variety of types, some with holes and wood distance pieces, early WW2 ones were tinned, etc.
Regards
TonyE