Australian built beetles got the "big" rear window update for the '58 year model release (like everyone else) but we retained the semaphore indicators until the 1960 y/m release.
That car also has a pre 1960 style steering wheel, so it is certainly a '58 or '59 year model.
However it also has bumper overriders and a fuel gauge which we got in '61 or '62.
But these were easily added items.
Interesting that I have not seen an aussie '58/59 with the yellow-ish interior paint colour shown on the dashboard shots, and if another later car was used for the interior shots why the early steering wheel combined with fuel gauge ??
And early steering wheels do not fit post 1960 cars....
I give up !