Very rare Saint Laurent Rive Gauche runway piece from the mid 1980s. It was acquired many years ago by the shop I used to manage. The previous owner was a regular at the Paris shows and would purchase items straight from the shows. 
It is authentic and you can find other pieces with similar provenance on another luxury site (leprix, I am not affiliated or selling any items on said site). The hats are of the same era with same numbered tags and no labels. 

Number-976 (the 101 tag may be the order-or the tag from the original estate lot)

Fine black sinamay straw with plaited faded purple(originally blue)straw trim and black ribbon ties.  
There are some unfortunate breaks that come with age and one or two careless employees. Nevertheless, this is a rare find for a collector or artist. 
Please bear in mind that my mannequin has a small head-however I loved how the exaggerated crown size looked wonderfully absurd. 

Size-about 6 3/4. 
Depth-4.75"
Bill-3.5"
Crown across-6.75"
Front to back-7"
Ribbons-30"

Please ask any questions prior to making an offer. 
The skirt is not for sale, however, the black beaded necklace is attributed to YSL and from the same collector's collection.