I don't believe Gillette made a pre-war Tech with a ball-end handle.
The pre-war Techs are identified by the triangular slots on the base plate and as far as I know (looking at mr-razor.com) all of those came with the fat handle.
Seems like the only way to get the exact razor you are seeking would be to combine a pre-war head with a post war ball-end handle.
Of course there is also the possiblity that I am completely full of .