Unit of assignment?

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All,
I am not a uniform collector at all, but a rifle collector. I have attached a period photo of a German(?) serviceman with a Dutch M1895 Mannlicher rifle in what is to me an unknown uniform. The collar patch is something I think I've seen before, but I don't have enough information to place this in context. Does anyone know what type of uniform this is, and what organization it would belong to? Thank you in advance.
Best,
Pat

[HPL2008]

He's with the Deutsche Reichsbahn [German National Railways].

He's acting in some kind of auxiliary/support role for the military, as he is wearing a Deutsche Wehrmacht [German Armed ForcesI] armband.

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Thank you, HPL2008. That wouldn't be an early Volkssturm armband, would it?
Best,
Pat

[HPL2008]

That wouldn't be an early Volkssturm armband, would it?

No; no Volkssturm connection.

These armbands were worn by personnel who were attached to the armed forces without being actual members of the military and thus not authorized to wear military uniforms. (You can see them worn in period photographs by uniformed personnel of the Railways, RAD, NSKK etc. as well as by civilians.)

They were worn for identification purposes and to afford the wearers the same rights under the statutes of the Geneva Convention as held by combatants.

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Thanks, HPL2008!
Pat