Vintage YSL Travel Bag - Brown with Leather Trim

This is vintage YSL - 1 of three pieces in a set of travel bags.It has not been used much, but there are no tags. Frankly the person this is from had it packed away for years, and had no idea she had it. I cannot find a label in it other than the logo on the outside, and that the interior has "YvesSaintLaurent" on repeat. The side zipper is YKK. There is a small tag in the upper by the zipper that says made in Korea. This bag is minimum 25 years old. Maybe it was a promo for something...maybe the addition information is in other of the other bags...they mystery continues. The "leather trim" - I think it might be pleather, or as we all now say, "vegan leather". Its from the 80's, so? So inner compartment is fully lined in the logo liner, and has a removable stiff bottom. No pockets in the interior. The side with the logo patch is a small zippered compartment (unlined). The back side unsnaps to show a cosmetics compartmentalized carry. There are clear pockets, a bottom zippered compartment, and a covered snap pocket. The bag has a single adjustable strap. There are a few marks on the bottom of the back pocket, some pmarking on the inner upper snap flap (looks like wear from the leather trim inside), a little on the bottom (there are feet that have some wear), and minor on the fron lower pocket where the YSL logo is. Measurements - 14 inches wide 10 inches tall 4.5 inches deep strap at longest setting is 38 inches long witha 15 inch drop.