Vintage Yves St Laurent luggage set

4-pc luggage set was gifted from Buick Motors in the 70s (why I left the tag on). The largest piece is the only one ever used, and only twice.  It does have a small nail polish spill on the very back..  The remaining 3 pcs are entact and never used.  The smallest I believe was for passport, travel papers, etc.  The next size up appears to be an attache or small briefcase with several sections.  The next one is a great carry-on size.  The leather tags show the YSL name; there are other tags stating Made in Taiwan.  I did find in my research that YSL did have a location in Taiwan at one time.  Beyond that I have not been able to find out anything more.