I am not sure how many more need to be posted before we can all conclude that straight sizes and nines are indeed an acceptable and perfectly legitimate (though less frequent) font style on 1940s Tri-Compaxes. In fact, at least on reference 22250, they seem to be the majority. I would also like to add that while looking at period ads it is indeed important and useful, it is not at all completely conclusive either way, as ads are known for sometimes not being pictures but drawings and for sometimes representing watches that didn't even exist, or early prototypes, etc...