I got pinged earlier by a thousand bands but forgot to reply.
Authentic Hermes' Kilims will have hardware that very much are high quality. I've attached some pics for easy giveaways for checking metal hardware, from my own encounters with fakes. The quality of the text engraving on the underside of deployment buckle also a good data point. The actual elastomer material itself.... from my experience it isn't always a giveaway since elastomer in and of itself is not a high end material to make or get. Apples sport bands for example can be hard to tell apart from Amazon fakes from purely material at times, but other things like serialized locking pin and the lasered tags have to be used to give it away.
Kilims also have a Datecode on them like leather bands. If you remove move the very first keeper out of place from its little spot, there will be Datecode info under it. You can compare very first letter to what's expected given the release year for that style (if it's out of season color), or to at least figure out the year it was made and then ask seller and see when they potentially bought and see if that matches your enough. Fake Hermes will often omit Datecode info altogether, or they'll use one of a handful of Generic ones that doesn't match what it's suppose to be. Only thing to keep in mind is that sometimes styles made in Winter can be sold in early spring and feature the next years Datecode, but if it's very obviously off (2024 style with a 2022 code) then it's giveaway
Also just other things like matching box with right text , if it comes with the proper pouch (paper for later versions, I don't think any Kilims shipped with cloth pouches?), proper Apple documentation inside pouch (obvious Kilims band shown in instructions and not leather one) can help as well. It's basically using the whole constellation of things you see to judge rather than singular smoking gun item
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