The symbol isn't exclusive to Nazis, and the styling suggests it's something else...

I mean, it looks like the right timeframe, and they did use the swastika in that form, but let me go plug it into tineye.

checks

Yeah, it's the Nazis.

https://www.alamy.com/this-associated-press-photo-shows-the-swastika-during-rehearsals-at-berlins-stadium-june-20-1938-berlin-germany-the-stadium-will-again-will-be-filled-to-capacity-when-the-hitler-youth-and-the-sa-are-celebrating-summer-solstice-day-in-the-olympic-stadium-june-21-1938-berlin-germany-hundreds-of-sa-men-will-form-a-torchlight-sun-wheel-in-germany-on-june-28-1938-ap-photo-image525598168.html?irgwc=1

This Associated Press photo shows the Swastika, during rehearsals at Berlins stadium, June 20, 1938, Berlin, Germany. The stadium will again will be filled to capacity when the Hitler Youth and the SA are celebrating summer solstice day in the Olympic Stadium, June 21, 1938, Berlin, Germany. Hundreds of SA men will form a torchlight sun wheel in Germany on June 28, 1938. (AP Photo)