Very Rare Guerlain Paris Ladies Suit,Employee Suit???

I got this suit about 5 or 6 years ago along with Shalimar perfume,I assume it's an employee uniform in Paris,maybe someone who worked for Guerlain,I've googled many sites still found nothing,has a cleaner's tag that has Yorkshire cleaners,tag in jacket is Guerlain Paris,very nice and clean size 10,I believe this is a rare item,anybody know about this item I would love to know.