Then I have a Cheval Turc, again in a 90x88 or so but the most baffling thing about this one is the material. Almost seems like a cashmere potentially. Did Hermes make scarves with other materials by chance?
Yes they did make 90s in cashmere. I can’t speak with authority on whether this design is among the styles H has done in cashmere in this size, but it’s definitely a possibility.
Thank you Rebecca 
I’m a step closer to identifying its authenticity in that case. Appreciate your feedback!
This is cheval turc It does exist in a cashmere version I actually saw one at an auction in Paris. You can also find some listed online, for example here: https://carresociety.com/products/foulard-carre-hermes-90-soie-et-cachemire-cheval-turc
That’s great Baptiste, thank you. Next time I’m in Paris maybe I should see if I can get it into an auction!