Thread: What made this razor worth $300?

I was following the auction of this razor.
I found it to be visually very attractive and it, for some reason, seemed very old.

It ended up selling for close to $300 - does anyone what it was? I couldn't find anything just searching for the key words in the ad.

Original ad:
Ancien rasoir Coupe Choux "Cler A Marseille" Chasse En Ècaille A Dècor Floral N | eBay