Hi Tomek,
I’d say it’s a good bet that the ribbon is original to the cross. These Grupa Techniczna made crosses did not all come with identical ribbons. There were also variations in the pin suspension. Some came with the one pictured on your cross and others with just the standard type safety pin. And these Grupa Techniczna crosses themselves are known in three distinct variants. Plenty of interesting little twists to keep us collectors entertained!
Cheers,
Tony
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