Changing fashions
The Man in the High Castle adapts Philip K. Dick's alternative history novel to the small screen. It imagines a '60s USA in the aftermath of the Axis powers' victory during the 1939–1945 war; a USA split between German and Japanese rule.
But, critically, it does not imagine that Nazi uniforms would have progressed beyond the fashions of the 1940s.
And, for a ha'p'orth of tar, the ship* was spoiled.
* Yes, I know, sheep.