Gucci by Tom Ford green velvet devore and black silk panel dress, from the Spring/Summer 1996 collection. Highly documented, as seen on the runway and advertising campaign photographed by Mario Testino. Kaftan style design with flared sleeves.
 
Condition
Very good
2 very small marks on the velvet, hardly visible, see last 2 photos.
The front clasp on the neckline has probably been added on - the mini versions of this dress featured an interlocking 'GG' logo clasp, whereas most of the documented longer versions did not. 
 
Marked Size
IT 40
 
Approximate Measurements
Oversized design
Bust: 36"
Waist: 35"
Length (measured from centre top of collar to hem): 53.5"