Three German men wearing the uniform of the Deaths Head or totenkopf badged Hussars. Unfortunately I do not have the regiment name.
Dated to First World War or just prior.
The hats worn here I have found mention of them to be called a peltmuze.
"Now if you’ll excuse me, I’m going to go on an overnight drunk, and in 10 days I’m going to set out to find the shark that ate my friend and destroy it. Anyone who wants to join me is more than welcome." - The Life Aquatic with Steve Zissou (2004)