thankyou for helping me. Apparently I can't post yet Haven't got enough postings
I would post pics of the bag in the Authentication thread in the Saint Laurent forum here https://forum.purseblog.com/forums/saint-laurent.37/
(see the yellow marked thread near the top of the forum)
They are very good at older YSL especially. I know some of the older YSL had a coating over the leather (patent finish).
Hope you gets some answers there.