6mm Unified Machinegun Belts

Hi guys,

I recently acquired the two different belt sections for the Russian experimental 6mm Unified machinegun shown in the photos below. From what I have been told, the section on top was made for the 6x53mm variant, while the section on the bottom was made for the more familiar 6x49mm variant.

Can anyone confirm if this is the case, and if possible, provide any additional information on these belts?

Thank you

FWIW a small bit of information-

Version of a 6x49mm belt discussed here:

Another photo of a possible 6x49mm belt, photo posted by Bekhan here:


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Thank you!