Armored trains and cars stripe

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Somebody can tell me what is it? The only information I found that it is armored cars and trains stripe, is it true?
Do you have any other photo of this stripe?
And is it real or fake?

Length/Width 75/55 mm.

Thanks for help.

[Tomasz70]

Looks like armored trains and cars badge / patch - shape of the helmet is the same. It is probably privates' and NCOs' patch. The badge / patch was used until 1926. It is very hard to find photos of the same patch as shown here. Please find some links for reference with visualisation:
zaloga pociagu pancernego "Gromoboj" - Ogólnopolski miesi (here is metal plate),
Polskie poci

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Thanks Tomasz, I also found picture of a badge/stripe as below and it is quite similar to your example.
Do you have any other page where I can look for some answers?

[Tomasz70]

I cannot recall any of the articles that could refer to the issue. There is no suitable internet source as well. The only compendium known to me with very poor quality drawing of the patch is Henryk Wielecki book - Polski mundur wojskowy 1918-1939.
Sorry.