Hi MarcusV and welcome to the forums.
I've moved your thread to the Vintage Chatter forum, as it was in the wrong place.
Can you please expand on "chain Chanel silk jackets" - do you mean styles like the silk bomber jacket that was printed in a chain design, or the classic boucle cardigan jacket with a hem weighted with a chain or something else? Thank you. If you have a photo it could help too.