The image is so small and the letters are so common, that it could be anything. You can try Arial Black or Helvetica Black, a bit expanded.

Chanel has always used exclusive bespoke typefaces and even for its main woodmark (makes sense for a fashion industry leading company). For instance, on chanel.com, they're using one as webfont which is called "abchanel-couture" and looks not so far from your sample. Whatever it is called, it's some sort of all-caps extended grotesk.
Some substitutes: Presicav, Adrianna, Sackers Gothic/Engravers Gothic/Blair (as previously suggested), Turnpike, Akzidenz-Grotesk Extended, Ronsard Crystal, Sweet Sans, Fashion, Zeppelin, Doublewide, Halogen, Idlewid, Luxury Gold, Biondi Sans...