You won't get a simple yes or no. The cop uniforms (in the States) differ in the 30's and 50s. In the 50's, only old geezers would wear 30's style suits. Womens hemlines in the 30's are like the 50's I think. Expensive evening gowns are often one offs so 30s evening wear might work for the 50s. Also the Radon Zombies in Bob Murch's Pulp Figures line are straight out of the 50s. As a rule, the answer is no, but there are exceptions. Also I am talking about the States I have no solid knowledge of Britian and the continent.
Have to disagree with you about the Radon Zombies. Such costumes appear in the 1930s. They most famously appear in the "Radar Men from the Moon" serial of the late 1940s, but they were recycling a look that far pre-dates that of the Atomic age.
Otherwise, I'm more or less in agreement, with the exception that Fedoras of all sizes remained in style until the 1960s, when two things happened.
First, men began to wear their hair longer, which made Fedoras less practical/comfortable.
Secondly, the "Duster" style Fedora that had gained in popularity was replaced by the very small Fedora that you start to see in the late 1950s/early 1960s, and the classic "Snap Brim" was essentially out of favor.
-Doc