ID on German Uniform - Border guard on Rhine River 1939

[Westwallbunker]

Hello folks,

I have recently come across a picture of a German soldier guarding one of the bridges across the Upper Rhine River.

What startled me were the dark cuffs on his uniform. I cannot find a matching image, that would tell me what branch this kind of uniform belongs to. I know parade uniforms have these, but in this situation I doubt they would have worn one. The cuffs also look different from the parade ones.
The tunic also shows dark collars, but doesn´t seem to be an M36, which doesn´t have the dark cuffs.

Could it be, that he is a police officer, that has been second to the border guard? Odd that the cuffs don´t show buttons, especially on the left gentleman. But maybe that´s the resolution or they´re hidden by shadows/angles etc.

Would love a second opinion on that.

Thank you!

Max

[HPL2008]

Both are definitely policemen.

[Westwallbunker]

thank you!