I don't believe you'll find them in that picture above, but we believe you'll find them (or their dance version) in the movie clip in post #506 .
As one can see, Mr. Astaire preferred a wide variety of toe shapes, including soft chisel, classic round and pointed round. I believe they were in accordance with what is most classic for the particular style, such as soft chisel on a full brogue spectator, round toe on a two tone derby, slightly pointed on a suede plain toe Balmoral.
As ever very informative and many thanks.
Foster & Son