Monique Lhuillier Sia Backless unclassified dresses

This Monique Lhuillier gown is stunning.  It features two overlapping layers of chantilly lace on top of a nude underlay. This dress features a mid-length train with bustle added (I believe it's called an American Bustle). The top of the gown is a strapless modified sweetheart neckline with gorgeous lace details. Dress features internal boning to add support.  I bought it as a sample at a boutique in San Francisco and spent $817 on alterations.  It originally retailed for $6380.  The dress is almost spotless on the exterior aside from a tiny, very faint light green/yellow spot on the bottom edge of the train.  I tried to capture this in the last photo.  It is not visible unless someone is on the ground looking for it.  There is also some dirt/markings on the inside of the nude underlay and the bottom of the crinoline from wearing it outside, these markings are not visible from the exterior of the dress.  This dress has not been professionally cleaned.  Please let me know if you would like more information or more pictures.