Circa 1900's, chemical lace bolero jacket. Chemical lace began in the 1880's whereby the lace was made by "seared"out the design.
1900's, Edwardian Battenburg Lace Jacket
The floral designs qualifies this post for a Floral Friday, at least in my mind.
Images from Maria Niforos, Fine Antique Lace, Linens and Textiles.