Absolutely amazing Au Bon Marche all original antique Victorian 1880’s black silk Mantle Cape.
 Designed so could be worn with a bustle dress.
Label in collar reads:  Au Bon Marche A Boucicaut 16500 T Paris 48.
Mantle is exquisitely made and lined of black silk and abundantly embroidered with corded black applique done in a vining floral and leaf design. 
Trimmed throughout with corded tassels and extensive 5” wide Chantilly lace trim. 
Jacket opens down the front having 2 long front panels.. It’s shorter and more fitted in the back and less fitted in front.
Large full cape like sleeves are sling like cut with the body of the garment in a semi fitted style.
Size appears to be somewhat flexible being approximately a S-M (6-10). 
Measures sh-sh 18”, bottom of collar to bottom of back 25”, sh to bottom of front panels 47”, sh to bottom of sleeve 30”. 
Color of fabric is very dark black and not at all washed out as in pics. 
Truly high style with an abundant and lavish design.
In amazingly good condition having only wear and tears in the lining of the collar.
Please enlarge and use zoom all photos to help you begin to see the amazing detail of the garment.
VERY difficult to photo.