Early ! Chanel Coll 20 unique paneled skirt 1984 ?

This possibly is a very early piece it could be from the first ready-to-wear collection. I’ve never seen a Chanel garment labeled collection 20. Usually what I see is collection 27 and 28 a lot. Try to do research into this collection number 20 could not find really anything if anyone has more information. Feel free to contact me.