Walter Hammond played only one Test against Jack Gregory in 1928, and he never faced Gregory's illustrious partner Ted McDonald. The fastest Australian bowler that Hammond faced in the 1930s was Tim Wall, and he was only fast-medium by most accounts.
In 13 Tests against the West Indies he averaged a mediocre 35.50. Significantly, Learie Constantine dismissed him 8 times during the 3 series that they played against each other. The other West Indian quicks, Griffith and Hylton picked-up Hammond twice each.
HowSTAT! Player Dismissal Analysis
Obviously, Hammond's status as an ATG cannot be questioned. However, Hammond's ability against quality fast bowling in the Test match arena remains a little unknown. Consequently, I think that there are better choices than Hammond when selecting ATG World XIs, although he clearly walks into any England XI.