Its tough to tell from the pictures. You don't have any showing the back and inside of the links. It looks like the MG17/81 belt but there are others that are similar.
I've tried running MG34/42 belts through my MG81 and without extensive mods to the feed tray it won't work. I did try running some MG17/81 links through an MG42 and it also did not work. So show us some good pics of the front and back of the links and maybe you'll find a buyer. I do believe the links are too tall to run well through the 34 or 42.
Gents.......I have and shoot two prs of -81's. The feed trays have an up incline to guide the empty links into the over the top of the feed cover chutes. I have several feed trays. None are without this inclined section. I cant imagine this belt being flexible enough to make the several turns involved. I tried to use an MG 42 belt in a single -81, no go, jammed right away. I really didnt think it would work, so I didnt investigate as to why. I can guarantee, this belt will not work in a twin set up.
Check the several curves and angles this type belt would have to negotiate........feed in is forward and almost under this exit chute.
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