The site The Fashion Historian has this about the dress, "The oak leaf dress was created in 1903, several years after Worth's death. However, his sons continued his couture business and it is clear that they inherited their fathers skill in design and detail. The silk satin dress features over 400 oak leaves, outlined in satin cord and chenille thread. The darker leaves on the skirt were created by actually cutting out oak leaf shapes, and backing the holes with silk net.”
It is possible that this stunning dress is no longer at the Museum of Costume in Bath.
From fripperiesandfobs.tumblr.com/post/103659349610/oak-leaf-dress-designed-by-worth-for-lady-mary. Fripperies and Fobs and Carolath Habsburg are reliable sources of information about historical fashion on the Internet; Fripperies and Fobs dates this to ca. 1902.
This image replaces one originally posted on 30 January 2011. Also posted to Mary Victoria Leiter of Chicago, Lady Curzon, Vicerine of India’s Subalbum here.
An image was available at the Museum of Costume, Bath Web site. I cannot locate the note in 2017. Their note included, "This graceful, yellow satin evening dress was made by Worth in about 1903. It is trimmed with silk chiffon and inset embroidery in a pattern of oak leaves."
Keywords: 1903, Worth, Lady Curzon, Mary Victoria Leiter, Mary Victoria Curzon, Baroness Curzon of Kedleston, Vicereine of India, Lady Curzon of Kedleston, Leiter family, Curzon family, Baroness, British, pouter pigeon bodice, scoop neckline, bertha, cap bare shoulder sleeves, waist band, down turned waistline, A-line skirt, flounces